This is kind of an ironic example, because the spheres in your code aren't moving. Instead the radius moves, which apears as if the spheres are moving. So where in most cases you could / would directly change the movement speed, in this case you change the rate at which the radius is changed. for example using modulo to do it every N frames instead of every frame.

Code example for updating the radius every 10th frame instead of every frame.

1.   if (frameCount % 10 == 0) {
2.     for(int i=0; i<100; i++) {
3.       if (i<99) { nuevo_corre[i ] = corre[i + 1 ]; }
4.       else { nuevo_corre[i] = random(121 ); }
5.     }
6.   }

The result is that the 'movement' is slower.

thanks for the reply  amonn.owed, but what about if i want that it moves faster? Is there any way to make it faster?

thanks

Seb.

the last two arguments here are the radiuseseses

ellipse( i * 5 , 20 , corre[i]/8 , corre[i]/8);

as you can see, they are being divided by 8. just change the 8.

koogy, but that change the size of the sphere , im asking how to make faster the "pseudo" movement of the spheres

Hey Seb,

Well, like I said before, actually having moving objects makes affecting the speed a lot easier, but given your code, here is a way to change the pseudo-movement. It increases the speed by moving the radius through the array faster. Initally the speed is 1 like in your example. If you increase this by pressing the letter X on your keyboard, it will result in faster 'movement'.

1. float[] corre = new float[100];
2. float[] nuevo_corre = new float[100];
3. int movspeed = 1;
4. void setup(){
5.   size(1200, 1200);
6.   for(int i=0 ; i<100 ; i++){
7.     corre[i]=  random(121 );
8.     nuevo_corre[i] = corre[i]; 
9.   }
10. }
11. void draw(){
12.   background(250, 250, 0);
13.     for(int i=0; i<100; i++) {
14.       if (i<100-movspeed) { nuevo_corre[i ] = corre[i + movspeed ]; }
15.       else if (i >= 100-movspeed) { nuevo_corre[i] = random(121 ); }
16.     }
17.   for(int i=0 ; i<100  ; i++){
18.     corre[i ] = nuevo_corre[i ];
19.     ellipse( i * 5 , 20 , corre[i]/8 , corre[i]/8);
20.   }
21. }
22. void keyPressed() {
23.   if (key == 'z') { if (movspeed > 1) { movspeed--; } }
24.   if (key == 'x') { movspeed++; }
25. }