diff --git a/draw.go b/draw.go
new file mode 100644
index 0000000..4844295
--- /dev/null
+++ b/draw.go
@@ -0,0 +1,208 @@
+package main
+
+import "fmt"
+import "git.tebibyte.media/sashakoshka/stone"
+
+func clear (x, y, width, height int) {
+	for yy := 0; yy < height; yy ++ {
+	for xx := 0; xx < width;  xx ++ {
+		application.SetRune(xx + x, yy + y, 0)
+		application.SetColor(xx + x, yy + y, stone.ColorForeground)
+	}}
+}
+
+func redraw () {
+	width, _ := application.Size()
+	showLeftColumn = width > 44
+
+	if showLeftColumn {
+		drawNumberReadouts()
+	}
+	drawInput()
+}
+
+func drawInput () {
+	width, height := application.Size()
+	xOffset := 0
+	if showLeftColumn {
+		xOffset = 26
+	}
+	y := height - 1
+	
+	inputWidth, _ := inputBuffer.Size()
+	newWidth := width - xOffset
+	if newWidth != inputWidth {
+		inputBuffer.SetSize(newWidth, 1)
+	}
+
+	inputBuffer.Clear()
+	if expressionRoot != nil {
+		expressionRoot.Render(&inputBuffer, 0)
+	}
+	
+	for x := 0; x < newWidth; x ++ {
+		character := '_'
+
+		cell := inputBuffer.Cell(x, 0)
+		if cell.Rune() > 0 {
+			character = cell.Rune()
+		}
+		
+		application.SetRune(x + xOffset, y, character)
+
+		if character == '_' {
+			application.SetColor(x + xOffset, y, stone.ColorDim)
+		} else {
+			application.SetColor(x + xOffset, y, cell.Color())
+		}
+	}
+}
+
+func drawNumberReadouts () {
+	_, height := application.Size()
+	
+	clear(0, height - 10, 25, 10)
+		
+	var number int64
+	var err error
+	if selectedExpression != nil {
+		number, err = selectedExpression.Solution()
+	}
+
+	if err != nil {
+		application.SetDot((25 - len(err.Error())) / 2, height - 6)
+		fmt.Fprint(application, err.Error())
+	} else {
+		drawHexadecimal (0, height - 10, uint64(number))
+		drawDecimal     (0, height - 8,  uint64(number))
+		drawOctal       (0, height - 6,  uint64(number))
+		drawBinary      (0, height - 4,  uint64(number))
+	}
+}
+
+func drawBinary (xOffset, yOffset int, number uint64) {
+	bitOffset := 64
+
+	for y := 0; y < 4;  y ++ {
+		application.SetDot(xOffset, y + yOffset)
+		fmt.Fprint(application, bitOffset)
+		application.SetColor(xOffset, y + yOffset, stone.ColorBlue)
+		application.SetColor(xOffset + 1, y + yOffset, stone.ColorBlue)
+	
+		for x := 0; x < 16; x ++ {
+			bitOffset --
+			
+			trueX := x + xOffset + x / 4 + 3
+			character := '0' + rune((number >> bitOffset) & 0x1)
+			
+			application.SetRune(trueX, y + yOffset, character)
+			if character == '0' {
+				application.SetColor (
+					trueX,
+					y + yOffset,
+					stone.ColorDim)
+			} else {
+				application.SetColor (
+					trueX,
+					y + yOffset,
+					stone.ColorForeground)
+			}
+		}
+		application.SetDot(xOffset + 23, y + yOffset)
+		fmt.Fprint(application, bitOffset + 1)
+		application.SetColor(xOffset + 23, y + yOffset, stone.ColorBlue)
+		application.SetColor(xOffset + 24, y + yOffset, stone.ColorBlue)
+	}
+}
+
+func drawHexadecimal (xOffset, yOffset int, number uint64) {
+	bitOffset := 64
+
+	application.SetDot(xOffset, yOffset)
+	fmt.Fprint(application, "16")
+	application.SetColor(xOffset, yOffset, stone.ColorBlue)
+	application.SetColor(xOffset + 1, yOffset, stone.ColorBlue)
+
+	for x := 0; x < 16; x ++ {
+		bitOffset -= 4
+		
+		trueX := x + xOffset + x / 4 + 6
+		character := rune((number >> bitOffset) & 0xF)
+		if character < 10 {
+			character += '0'
+		} else {
+			character += 'A' - 10
+		}
+		
+		application.SetRune(trueX, yOffset, character)
+		if character == '0' {
+			application.SetColor (
+				trueX,
+				yOffset,
+				stone.ColorDim)
+		} else {
+			application.SetColor (
+				trueX,
+				yOffset,
+				stone.ColorForeground)
+		}
+	}
+}
+
+func drawDecimal (xOffset, yOffset int, number uint64) {
+	var divisor uint64 = 10000000000000000000
+
+	application.SetDot(xOffset, yOffset)
+	fmt.Fprint(application, "10")
+	application.SetColor(xOffset, yOffset, stone.ColorBlue)
+	application.SetColor(xOffset + 1, yOffset, stone.ColorBlue)
+
+	for x := 0; x < 20; x ++ {
+		trueX := x + xOffset + 5
+		character := rune((number / divisor) % 10) + '0'
+		
+		application.SetRune(trueX, yOffset, character)
+		if character == '0' {
+			application.SetColor (
+				trueX,
+				yOffset,
+				stone.ColorDim)
+		} else {
+			application.SetColor (
+				trueX,
+				yOffset,
+				stone.ColorForeground)
+		}
+		divisor /= 10
+	}
+}
+
+func drawOctal (xOffset, yOffset int, number uint64) {
+	// fuck octal i hate it almost as much as decimal
+	bitOffset := 63
+
+	application.SetDot(xOffset, yOffset)
+	fmt.Fprint(application, "08")
+	application.SetColor(xOffset, yOffset, stone.ColorBlue)
+	application.SetColor(xOffset + 1, yOffset, stone.ColorBlue)
+
+	for x := 0; x < 21; x ++ {
+		bitOffset -= 3
+		
+		trueX := x + xOffset + 4
+		character := '0' + rune((number >> bitOffset) % 8)
+		
+		application.SetRune(trueX, yOffset, character)
+		if character == '0' {
+			application.SetColor (
+				trueX,
+				yOffset,
+				stone.ColorDim)
+		} else {
+			application.SetColor (
+				trueX,
+				yOffset,
+				stone.ColorForeground)
+		}
+	}
+}
diff --git a/main.go b/main.go
index df86e39..17546fe 100644
--- a/main.go
+++ b/main.go
@@ -1,6 +1,5 @@
 package main
 
-import "fmt"
 import "bytes"
 import "image"
 import _ "embed"
@@ -159,7 +158,7 @@ func onPress (button stone.Button) {
 		}
 
 		switch selectedExpression.(type) {
-		case *Operation:
+		case *Operation, nil:
 			insertGeneric (&IntegerLiteral {
 				displayRadix: 10,
 				value: int64(value),
@@ -296,207 +295,3 @@ func insertGeneric (expression Expression) {
 func onStart () {
 	redraw()
 }
-
-func redraw () {
-	width, _ := application.Size()
-	showLeftColumn = width > 44
-
-	if showLeftColumn {
-		drawNumberReadouts()
-	}
-	drawInput()
-}
-
-func drawInput () {
-	width, height := application.Size()
-	xOffset := 0
-	if showLeftColumn {
-		xOffset = 26
-	}
-	y := height - 1
-	
-	inputWidth, _ := inputBuffer.Size()
-	newWidth := width - xOffset
-	if newWidth != inputWidth {
-		inputBuffer.SetSize(newWidth, 1)
-	}
-
-	inputBuffer.Clear()
-	if expressionRoot != nil {
-		expressionRoot.Render(&inputBuffer, 0)
-	}
-	
-	for x := 0; x < newWidth; x ++ {
-		character := '_'
-
-		cell := inputBuffer.Cell(x, 0)
-		if cell.Rune() > 0 {
-			character = cell.Rune()
-		}
-		
-		application.SetRune(x + xOffset, y, character)
-
-		if character == '_' {
-			application.SetColor(x + xOffset, y, stone.ColorDim)
-		} else {
-			application.SetColor(x + xOffset, y, cell.Color())
-		}
-	}
-}
-
-func drawNumberReadouts () {
-	_, height := application.Size()
-	
-	clear(0, height - 10, 25, 10)
-		
-	var number int64
-	var err error
-	if selectedExpression != nil {
-		number, err = selectedExpression.Solution()
-	}
-
-	if err != nil {
-		application.SetDot((25 - len(err.Error())) / 2, height - 6)
-		fmt.Fprint(application, err.Error())
-	} else {
-		drawHexadecimal (0, height - 10, uint64(number))
-		drawDecimal     (0, height - 8,  uint64(number))
-		drawOctal       (0, height - 6,  uint64(number))
-		drawBinary      (0, height - 4,  uint64(number))
-	}
-}
-
-func clear (x, y, width, height int) {
-	for yy := 0; yy < height; yy ++ {
-	for xx := 0; xx < width;  xx ++ {
-		application.SetRune(xx + x, yy + y, 0)
-		application.SetColor(xx + x, yy + y, stone.ColorForeground)
-	}}
-}
-
-func drawBinary (xOffset, yOffset int, number uint64) {
-	bitOffset := 64
-
-	for y := 0; y < 4;  y ++ {
-		application.SetDot(xOffset, y + yOffset)
-		fmt.Fprint(application, bitOffset)
-		application.SetColor(xOffset, y + yOffset, stone.ColorBlue)
-		application.SetColor(xOffset + 1, y + yOffset, stone.ColorBlue)
-	
-		for x := 0; x < 16; x ++ {
-			bitOffset --
-			
-			trueX := x + xOffset + x / 4 + 3
-			character := '0' + rune((number >> bitOffset) & 0x1)
-			
-			application.SetRune(trueX, y + yOffset, character)
-			if character == '0' {
-				application.SetColor (
-					trueX,
-					y + yOffset,
-					stone.ColorDim)
-			} else {
-				application.SetColor (
-					trueX,
-					y + yOffset,
-					stone.ColorForeground)
-			}
-		}
-		application.SetDot(xOffset + 23, y + yOffset)
-		fmt.Fprint(application, bitOffset + 1)
-		application.SetColor(xOffset + 23, y + yOffset, stone.ColorBlue)
-		application.SetColor(xOffset + 24, y + yOffset, stone.ColorBlue)
-	}
-}
-
-func drawHexadecimal (xOffset, yOffset int, number uint64) {
-	bitOffset := 64
-
-	application.SetDot(xOffset, yOffset)
-	fmt.Fprint(application, "16")
-	application.SetColor(xOffset, yOffset, stone.ColorBlue)
-	application.SetColor(xOffset + 1, yOffset, stone.ColorBlue)
-
-	for x := 0; x < 16; x ++ {
-		bitOffset -= 4
-		
-		trueX := x + xOffset + x / 4 + 6
-		character := rune((number >> bitOffset) & 0xF)
-		if character < 10 {
-			character += '0'
-		} else {
-			character += 'A' - 10
-		}
-		
-		application.SetRune(trueX, yOffset, character)
-		if character == '0' {
-			application.SetColor (
-				trueX,
-				yOffset,
-				stone.ColorDim)
-		} else {
-			application.SetColor (
-				trueX,
-				yOffset,
-				stone.ColorForeground)
-		}
-	}
-}
-
-func drawDecimal (xOffset, yOffset int, number uint64) {
-	var divisor uint64 = 10000000000000000000
-
-	application.SetDot(xOffset, yOffset)
-	fmt.Fprint(application, "10")
-	application.SetColor(xOffset, yOffset, stone.ColorBlue)
-	application.SetColor(xOffset + 1, yOffset, stone.ColorBlue)
-
-	for x := 0; x < 20; x ++ {
-		trueX := x + xOffset + 5
-		character := rune((number / divisor) % 10) + '0'
-		
-		application.SetRune(trueX, yOffset, character)
-		if character == '0' {
-			application.SetColor (
-				trueX,
-				yOffset,
-				stone.ColorDim)
-		} else {
-			application.SetColor (
-				trueX,
-				yOffset,
-				stone.ColorForeground)
-		}
-		divisor /= 10
-	}
-}
-
-func drawOctal (xOffset, yOffset int, number uint64) {
-	// fuck octal i hate it almost as much as decimal
-	bitOffset := 63
-
-	application.SetDot(xOffset, yOffset)
-	fmt.Fprint(application, "08")
-	application.SetColor(xOffset, yOffset, stone.ColorBlue)
-	application.SetColor(xOffset + 1, yOffset, stone.ColorBlue)
-
-	for x := 0; x < 21; x ++ {
-		bitOffset -= 3
-		
-		trueX := x + xOffset + 4
-		character := '0' + rune((number >> bitOffset) % 8)
-		
-		application.SetRune(trueX, yOffset, character)
-		if character == '0' {
-			application.SetColor (
-				trueX,
-				yOffset,
-				stone.ColorDim)
-		} else {
-			application.SetColor (
-				trueX,
-				yOffset,
-				stone.ColorForeground)
-		}
-	}
-}