My pikachu linear art design

1.y=x+3

2.y=x-3

3.y=x*1

4.y=x*-1

5.y=x+7

6.y=x-7

7.y=x*7

8.y=x*-7

9.y=x+10

10.y=x-10

 

Then you draw a pikachu face in the center