Array?

// Making an array 

// Played with one from Daniel Shiffmans book to get better used to arrays.

// February 27, 2014

// Arthur Siebesian

int[] xpos = new int[50];

int[] ypos = new int[50];

​

void setup() {

  size (500,500);

  smooth();

  frameRate(60);

  for(int i= 0; i < xpos. length-1; i++) {

    xpos[i] = 0;

    ypos[i] = 0;

  }

}

​

void draw() {

  background(0);

  for (int i = 0; i < xpos.length-1; i++) {

 xpos [i] = xpos[i + 1]; 

 ypos[i] = ypos[i + 1]; 

 }

xpos[xpos.length-1] = mouseX;

ypos[ypos.length-1] = mouseY;

for(int i = 0; i < xpos. length; i++) {

 noStroke(); 

 fill(random(255),0,0); 

 ellipse(xpos[i],ypos[i],i,i); 

 println("ELLIPSE4LYFE");

 } 

 }