// Makes a geometric pattern with lines and squares
size(400,200);

int black = 0;
int darkGray = 100;
int lightGray = 200;
int white = 255;

// Make irregular lines up and down the screen
line(30, 0, 30, 200);
line(50, 0, 50, 200);
line(120, 0, 120, 200);
line(180, 0, 180, 200);
line(280, 0, 280, 200);

// Make increasing rectangles across the screen
rectMode(CENTER);
rect(85, 100, 10, 10);
rect(230, 100, 20, 20);
rect(340, 100, 30, 30);