diff --git a/README.md b/README.md
index 0af92ba..705b30b 100644
--- a/README.md
+++ b/README.md
@@ -5,9 +5,9 @@
 [![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg)](https://raw.githubusercontent.com/jdxyw/generativeart/master/LICENSE)
 
 
-`generativeart` is a `Go` package to generate many kinds of generative art. The goal is to collect some excellent generative art (implemented in `R` or `Processing`), and rewrite them in `Go` again. I would paste the original link at the end of this README(If I remember. You can also submit a PR if you found I miss something.). Currently, it supports the following type.
+`generativeart` is a `Go` package to generate many kinds of generative art. The goal is to collect some excellent generative art (implemented in `R` or `Processing`), and rewrite them in `Go` again. I would paste the original link at the end of this README(If I remember, you can also submit a PR if you found I missed something.). Currently, it supports the following type.
 
-This package is still working in progress, more types would be added. Welcome anyone interested in this field to submit your PR.
+This package is still working in progress. More types would be added. Welcome anyone interested in this field to submit your PR.
 
 - Maze
 - Julia Set
@@ -28,7 +28,7 @@ This package is still working in progress, more types would be added. Welcome an
 - Circle Grid
 - Contour Line
 
-For these kinds of art, the package provides as many as parameters to control the appearance.
+For these kinds of art, the package provides as many parameters to control the appearance.
 
 ## Install
 
diff --git a/docs/doc.md b/docs/doc.md
index 7a1394e..851a8dd 100644
--- a/docs/doc.md
+++ b/docs/doc.md
@@ -1,10 +1,10 @@
 ## Color Circle 2
 
-`Color Circle2` is version 2 of `Color Circle`. It still draws circle and point cloud.
+`Color Circle2` is version 2 of `Color Circle`. It still draws the circle and point cloud.
 
 ### parameters
 
-- circleNum: The number of circle in this drawing.
+- circleNum: The number of the circle in this drawing.
 
 ```go
 cc := generativeart.NewColorCircle2(30)
@@ -14,13 +14,13 @@ cc := generativeart.NewColorCircle2(30)
 
 ## Dot Line
 
-`dot line` would draw images with short dot and short. The short lines would compose as a big circle.
+`dot line` would draw images with the short dot and short. The short lines would compose as a big circle.
 
 ### parameters
 
-- n: The number of element in this image.
+- n: The number of elements in this image.
 - ras/canv: Control the appearance of this image.
-- randColor: Use the the specified color or random colors.
+- randColor: Use the specified color or random colors.
 
 ```go
 dl := generativeart.NewDotLine(100, 20, 50, false)
@@ -52,7 +52,7 @@ rs := NewRandomShape(150)
 
 ## Contour Line
 
-`Contour Line` uses `perlin noise` to do some flow field.
+`Contour Line` uses the `perlin noise` to do some flow field.
 
 ### parameters