Arrays of Bouncing ball

int nBall=5;//number of the ball

float dia=40;//diameter

//int xPos;

float[] xPos= new float[nBall];

float[] ySpeed=new float[nBall]; 

float[] yPos=new float[nBall];

void setup(){

size(400,400);

smooth();

noStroke();

background(67,152,92);

fill(191,13,25);

​

 for(int i=0; i<nBall;i++){

    xPos[i]=50+50*i;

    ySpeed[i]=random(-10,10);

    yPos[i]=random(10,height-10);

​

}

}

​

void draw(){

​

  background(9,152,219);

    for(int i=0;i<nBall;i++){  

      ellipse(xPos[i],yPos[i],dia,dia);

      if(yPos[i]>=height-dia/2||yPos[i]<=dia/2){

      ySpeed[i]=-ySpeed[i];

      }

​

    yPos[i]=yPos[i]+ySpeed[i];

    }

​

  }