Monster Tessellation (1) : Monster and Skull (with Hat)

400x400 pixels (GIF animation) 

400x400 pixels (GIF animation) 

1024x1024 pixels (Click on the image for a larger view.)
This picture is derived from the tenth picture
in this page: Tessellation using Inequalities (1)

( Softwares used: gnuplot --> GIMP --> PhotoScape )

Tessellation (Tiling) using Inequalities (1)

1200x1200 pixels

Monster and Skull

These pictures were made using inequalities (inequations).

For example, the blue area in the picture below is the graph of

the inequality cos(2y) cos(y+sqrt(3)x) cos(y-sqrt(3)x) < 0.

( Mathematical software used: Graph )