The sketch continually fills rectangles on the window:

[add]

hello everyone! how I can do this exercise? The rect may never leave the bounds of the window!

void setup(){
  size(842,480);
    stroke(0);
  frameRate(10);
}
void draw (){ 
int randomX;
int randomY;
int randomH;
int randomW;

randomX=int (random(842));
randomY= int(random(480));
randomH= int (random (480));
randomW= int (random (842));

int r= int(random (255));
int g= int (random (255));
int b= int (random (255));

fill(r,g,b);
rect(randomX, randomY, randomW, randomH);

}
  

[josephh]

Hi @add,

@add

hello everyone! how I can do this exercise?

Programming is about solving problems but we are not going to give you the full solution yet!

You can read this previous thread which may help you achieve what you want to do:

Why my draw() don't drawing continuously?

void setup () { size (842,480);frameRate(20);} float x = random (842); float y = random (480); float r = random (256); float g = random (256); float b = random (256); void draw () {loop ();fill (r,g,b);rect (x,y,x,y);} Can someone explain me pls why ? :3

[glv]

Hello @add,

Resources (tutorials, references and example) are here:
https://processing.org/

You must look up the reference for rect() with close attention to the syntax and parameters.

This may help you with the co-ordinate system:

void setup()
  {
  size(300, 400);
  }

void draw ()
  { 
  rect(mouseX, mouseY, 100, 100);
  println(mouseX, mouseY);
  }

Have fun and experiment!

:)

[add]

thanks a lot @josephh , @glv ! I managed to solve the problem thanks to your help