float r = 0;
float backR;
float backG;
float backB;
void setup() {
size(500,500);
backR = random(0,100);
backG = random(0,100);
backB = random(0,100);
background(random(0,255),random(255),random(255));
rectMode(CENTER);
noStroke();
smooth();
}
void draw() {
fill(backR, backG, 162,50);
rect(width/2, height/2, width, height);
fill(255);
translate(mouseX,mouseY);
rotate(r);
rect(0, 0, 100, 100);
r= r + (1.5);
}...
