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function setup() {
createCanvas(500,500 );
background('white');
noLoop();
}
function draw() {
let space = 20;
strokeWeight(3);
fill(0);
for(x = 0; x < width + 30; x+=space) {
for(y = 0; y < height + 30; y+=space) {
let c = random(0,4)
if(c < 1) {
line(x,y, x+space,y+space);
}
else if(c < 2) {
line(x,y+space, x+space,y);
}
else if(c < 3)
{
line(x,y+space, x,y);
}
else if(c < 4) {
line(x,y, x+space,y);
}
}
}
}