How to draw a square wave based on a trigonometric function

The function is in the attached picture and the ideal output wave should be the same as the wave in the attached picture but with 6 blocks (three on the positive y direction and three in negative y direction).

[Shubham Gupta]

Sorry mate, but I think your images have not been uploaded correctly. Try reducing the size of the images. Thanks !

Answer 1

[danyang yao]

Here are the images.