float rot1 = 0;
int xpos = 50;
int ypos = 50;
void setup(){
smooth();
//rectMode(CENTER);
noFill();
colorMode(RGB,100);
}
void draw(){
background(255,255,255);
rot1 += 0.003;
pushMatrix();
translate(50,50);
rotate(rot1);
color c3 = color(0,0,0,100);
stroke(c3);
rect(0,0,30,30);
popMatrix();
color c1 = color(255,0,0,50);
stroke(c1);
rect(xpos,ypos,30,30);
color c2 = color(0,0,255,50);
stroke(c2);
line(0,height/2,width,height/2);
line(width/2,0,width/2,height);
}