diff --git a/block.go b/block.go
index c479140..9fc5f5f 100644
--- a/block.go
+++ b/block.go
@@ -6,10 +6,6 @@ package termui
 
 import "image"
 
-// Copyright 2015 Zack Guo <gizak@icloud.com>. All rights reserved.
-// Use of this source code is governed by a MIT license that can
-// be found in the LICENSE file.
-
 // Hline is a horizontal line.
 type Hline struct {
 	X   int
@@ -33,7 +29,7 @@ func (l Hline) Buffer() Buffer {
 	if l.Len <= 0 {
 		return NewBuffer()
 	}
-	return NewFilledBuffer(l.X, l.Y, l.X+l.Len, l.Y, HORIZONTAL_LINE, l.Fg, l.Bg)
+	return NewFilledBuffer(l.X, l.Y, l.X+l.Len, l.Y+1, HORIZONTAL_LINE, l.Fg, l.Bg)
 }
 
 // Buffer draws a vertical line.
@@ -41,7 +37,7 @@ func (l Vline) Buffer() Buffer {
 	if l.Len <= 0 {
 		return NewBuffer()
 	}
-	return NewFilledBuffer(l.X, l.Y, l.X, l.Y+l.Len, VERTICAL_LINE, l.Fg, l.Bg)
+	return NewFilledBuffer(l.X, l.Y, l.X+1, l.Y+l.Len, VERTICAL_LINE, l.Fg, l.Bg)
 }
 
 // Buffer draws a box border.
@@ -55,8 +51,8 @@ func (b Block) drawBorder(buf Buffer) {
 
 	x0 := min.X
 	y0 := min.Y
-	x1 := max.X
-	y1 := max.Y
+	x1 := max.X - 1
+	y1 := max.Y - 1
 
 	// draw lines
 	if b.BorderTop {
@@ -148,8 +144,8 @@ func NewBlock() *Block {
 func (b *Block) Align() {
 	b.area.Min.X = b.X
 	b.area.Min.Y = b.Y
-	b.area.Max.X = b.X + b.Width - 1
-	b.area.Max.Y = b.Y + b.Height - 1
+	b.area.Max.X = b.X + b.Width
+	b.area.Max.Y = b.Y + b.Height
 
 	b.innerArea.Min.X = b.X + b.PaddingLeft
 	b.innerArea.Min.Y = b.Y + b.PaddingTop
diff --git a/block_main.go b/block_main.go
new file mode 100644
index 0000000..a55160c
--- /dev/null
+++ b/block_main.go
@@ -0,0 +1,19 @@
+// +build ignore
+
+package main
+
+import "github.com/gizak/termui"
+
+func main() {
+	termui.Init()
+
+	termui.UseTheme("helloworld")
+	b := termui.NewBlock()
+	b.Width = 20
+	b.Height = 30
+	b.BorderLabel = "HELLO WORLD"
+
+	termui.Render(b)
+	<-termui.EventCh()
+	termui.Close()
+}
diff --git a/grid.go b/grid.go
index 1b15b92..cd6f896 100644
--- a/grid.go
+++ b/grid.go
@@ -161,7 +161,7 @@ func (r *Row) SetWidth(w int) {
 // Buffer implements Bufferer interface,
 // recursively merge all widgets buffer
 func (r *Row) Buffer() Buffer {
-	merged := Buffer{}
+	merged := NewBuffer()
 
 	if r.isRenderableLeaf() {
 		return r.Widget.Buffer()
@@ -169,13 +169,13 @@ func (r *Row) Buffer() Buffer {
 
 	// for those are not leaves but have a renderable widget
 	if r.Widget != nil {
-		merged.Union(r.Widget.Buffer())
+		merged.Merge(r.Widget.Buffer())
 	}
 
 	// collect buffer from children
 	if !r.isLeaf() {
 		for _, c := range r.Cols {
-			merged.Union(c.Buffer())
+			merged.Merge(c.Buffer())
 		}
 	}
 
@@ -268,10 +268,10 @@ func (g *Grid) Align() {
 
 // Buffer implments Bufferer interface.
 func (g Grid) Buffer() Buffer {
-	buf := Buffer{}
+	buf := NewBuffer()
 
 	for _, r := range g.Rows {
-		buf.Union(r.Buffer())
+		buf.Merge(r.Buffer())
 	}
 	return buf
 }
diff --git a/textRender.go b/textRender.go
index 8a0f1ca..97a5aba 100644
--- a/textRender.go
+++ b/textRender.go
@@ -9,6 +9,83 @@ import (
 	"strings"
 )
 
+// Minial interface
+type TextBuilder interface {
+	Build(s string, fg, bg Attribute) []Cells
+}
+
+type MarkdownTxBuilder struct {
+	regex   string
+	pattern *regexp.Regexp
+	baseFg  Attribute
+	baseBg  Attribute
+}
+
+var colorMap = map[string]Attribute{
+	"red":     ColorRed,
+	"blue":    ColorBlue,
+	"black":   ColorBlack,
+	"cyan":    ColorCyan,
+	"white":   ColorWhite,
+	"default": ColorDefault,
+	"green":   ColorGreen,
+	"magenta": ColorMagenta,
+}
+
+var attrMap = map[string]Attribute{
+	"bold":      AttrBold,
+	"underline": AttrUnderline,
+	"reverse":   AttrReverse,
+}
+
+func rmSpc(s string) string {
+	reg := regexp.MustCompile(`\s+`)
+	return reg.ReplaceAllString(s, "")
+}
+
+// readAttr translates strings like `fg-red,fg-bold,bg-white` to fg and bg Attribute
+func (mtb MarkdownTxBuilder) readAttr(s string) (Attribute, Attribute) {
+	fg := mtb.baseFg
+	bg := mtb.baseBg
+
+	updateAttr := func(a Attribute, attrs []string) Attribute {
+		for _, s := range attrs {
+			if c, ok := colorMap[s]; ok {
+				a &= ^(1<<9 - 1) //erase clr 0 ~ 1<<9-1
+				a |= c           // set clr
+			}
+			if c, ok := attrMap[s]; ok {
+				a |= c
+			}
+		}
+		return a
+	}
+
+	ss := strings.Split(s, ",")
+	fgs := []string{}
+	bgs := []string{}
+	for _, v := range ss {
+		subs := strings.Split(ss, "-")
+		if len(subs) > 1 {
+			if subs[0] == "fg" {
+				fgs := append(fgs, subs[1])
+			}
+			if subs[0] == "bg" {
+				bgs := append(bgs, subs[1])
+			}
+		}
+	}
+
+	fg = updateAttr(fg)
+	bg = updateAttr(bg)
+	return fg, bg
+}
+
+type EscCodeTxBuilder struct {
+	regex   string
+	pattern *regexp.Regexp
+}
+
 // TextRenderer adds common methods for rendering a text on screeen.
 type TextRenderer interface {
 	NormalizedText() string