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void setup() {
size(500, 500);
background(255);
}
void draw() {
if(mouseX >245 && mouseX < 255 && mouseY > 245 && mouseY < 255){
background(0);
}
else{
background(255);
}
if(mousePressed){
fill(0);
rect(0, 0, 10, 500);
rect(50, 0, 10, 500);
rect(100, 0, 10, 500);
rect(150, 0, 10, 500);
rect(200, 0, 10, 500);
rect(250, 0, 10, 500);
rect(300, 0, 10, 500);
rect(350, 0, 10, 500);
rect(400, 0, 10, 500);
rect(450, 0, 10, 500);
}
stroke(0);
noFill();
ellipse(245, 250, 5, 5);
}