size(540,600);
background(255);


fill(215,35,15);//red boxes
stroke(215,35,15);
rect(0,0,30,128);
rect(0,318,30,32);
rect(456,272,64,46);

fill(30,70,170);//blue boxes
stroke(30,70,170);
rect(160,0,72,52);
rect(456,566,84,34);

fill(250,200,10);//yellow boxes
stroke(250,200,10);
rect(160,206,72,144);


stroke(0);
strokeWeight(14);
strokeCap(SQUARE);
line(37,0,37,350);//vertical lines
line(167,0,167,600);
line(239,0,239,350);
line(371,0,371,600);
line(393,0,393,600);
line(421,0,421,566);
line(463,0,463,600);
line(527,0,527,350);

line(0,59,520,59);//horizontal lines
line(44,213,520,213);
line(0,357,540,357);
line(364,459,540,459);
line(160,573,540,573);