var a=0.01,t=0;//initial values for coefficients, and reset counter t

function setup() {

  createCanvas(400, 400); //create the canvas

  background(20); //black background

  strokeWeight(0.1);//thin lines

}

​

function draw() {

  translate(width/2,width/2) //translate the canvas for (0,0)middle

    fill(200, 250-10*t, 250,40)//gradient fill

    x1 = cnt; //set x to counter

    y1 = a*pow((x1),3)//Polynomial y value ax^3+bx^2+cx

    if(y1>-200 && y1 <200){ //only draw circles if it is on the canvas

      circle(x1*15,y1,cnt*3)//draw a circle for a point on the polynomial

    }

    cnt=cnt+0.3; //increase counter for x

    if (cnt>12){//draw the next polynomial

      newCoeff();// function to change coefficients

    }

}

function newCoeff(){

  a = a*1.5//change a

  cnt = -12;//reset cnt

  t = t+1; //increment screen reset counter

  if (t> 20){ 

    //background(0);//reset canvas

    //t=0,k = 0, p = 1,h = 0;//initialize variables

    noLoop()//stops when done - uncomment previous two lines to loop and comment this one

  }

}

​