Hi, Im starting with processing, I've draw some fractals and now I want to make some animations.

I,ve read this page:

jtnimoy.net

and I've tried this code that I´ve found there:
Code:

int x = 0;

void setup( ){
    noStroke( );
}

void loop( ){
    background(190); 
    rect(x, 0, 5, 100);
    x=x+1;
}
 

It´s supossed to draw a rectangle moving to the right, but it doesnt draw anything at all, it only open a little window with nothing in it.

In fact, I´ve made some tries and I can´t draw nothing at all inside the loop function.

Thank you, I've made this and it works.

There is something that it seems odd to me. The only question is a change of name between loop and draw? It seems odd to me bacause maybe  I want to make a loop without any drawing, for example to control some lamps with arduino, it seems odd to me to use the draw function without any drawings.