Revised Code

  1:int sizeWindow=600;
  2:int centre=sizeWindow/2;
  3:int xpos = centre;
  4:int ypos = centre;
  5:int patternsPerPicture=round(random(2,50));
  6:
  7:int interval=30;
  8:int count;
  9:void setup(){
 10:  size(sizeWindow, sizeWindow);
 11:  background(0);
 12:  stroke(204, 102, 0);//colour red
 13:  noFill();
 14:  frameRate(.2);
 15:  draw();}
 16:
 17:void draw(){
 18:  count=0;
 19:  int design=0;
 20:  background(0);   
 21:  for(count=0;count<patternsPerPicture;count++){
 22:    strokeWeight(getSW());//set the strokewright to the number returned by the getSW function
 23:    noFill();
 24:    interval=round(random(5,70));//increment by interval in while loops
 25:    changeColour();
 26:    design=round(random(1,9)); //a random numver for which design to use in the switch
 27:    switch(design){
 28:    case 1:       
 29:      repeatShapes(round(random(3,70)),'2');
 30:      break;
 31:    case 2:                        
 32:      drawCircles(round(random(20,round(random(1,50)))));     //call the drawCircles function
 33:      break;
 34:    case 3:
 35:      repeatShapes(round(random(1,width/2)),'2');//use the drawCircle2 function      
 36:      break;  
 37:    case 4:
 38:      repeatShapes(width-round(random(2,width/4)),'3');
 39:      break;
 40:    case 5:        
 41:      doLines();          
 42:    case 6:   
 43:      repeatShapes(interval,'5');
 44:      break;
 45:    case 7:                
 46:      repeatShapes(round(random(1,40)),'2');
 47:      break;
 48:    case 8:
 49:    default:
 50:      repeatShapes(width-round(random(1,width/2)),'4');//draws unfilled squares             
 51:    }}
 52:  patternsPerPicture=round(random(2,50));}
 53:
 54:void changeColour(){
 55:  stroke(random(255),random(255),random(255));
 56:}
 57:
 58:void drawCircles(int gap){
 59:  for(int n=0;n<round(random(width/2,width));n+=gap){  
 60:    drawCircle(n);}}
 61:
 62:void drawCircle2(int diameter){
 63:    ellipse(xpos, ypos, diameter-random(5,diameter), diameter-random(5,diameter));  }
 64:
 65:void drawCircle3(int diameter){
 66:  ellipse(xpos, ypos, (diameter*random(5,diameter))/(random(5,diameter)*19), (diameter*random(5,diameter))/(random(5,diameter)*19) );
 67:}
 68:
 69:void drawSquares(int diameter){
 70:  int r= round(random(1,4));
 71:  rectMode(RADIUS);
 72:  if(r==1){
 73:    noStroke();
 74:    rectMode(CENTER);}
 75:  else if(r==2){
 76:    diameter=diameter/20;}
 77:  else if(r==3){
 78:    changeColour();}
 79:  else{
 80:    diameter=diameter/20;
 81:    stroke(round(random(255)),round(random(255)),round(random(255)),round(random(255)));}
 82:  rect(xpos,ypos,diameter,diameter);}
 83:
 84:int getSW(){
 85:  int fc=round(random(frameRate*500)/5);
 86:  return fc%10;
 87:  }
 88:
 89:void repeatShapes(int gap, char c){
 90:  char shape=c;              
 91:  int interval=gap;
 92:  while(interval<width){//while intervel is less than the width of the window
 93:    if(shape=='1')drawCircles(interval);
 94:    else if(shape=='2'){
 95:      drawCircle2(interval);
 96:    }//call function drawCircle2 with a random parameter
 97:    else if(shape=='3'){
 98:      drawCircle3(interval);}
 99:    else if(shape=='4'){
100:      int r=round(random(1,5));
101:      if(r==1){
102:        noStroke();
103:        changeColour();
104:        fill(random(255),random(255),random(255));}
105:      drawSquares(round(interval));}
106:    else{
107:      int r=round(random(1,5));
108:      if(r==1){
109:        noStroke();   
110:        fill(random(255),random(255),random(255));}   
111:        drawCircle2(interval/4);     }
112:    interval+=gap;}}
113:
114:void doLines(){
115:  strokeWeight(getSW());
116:  for(int b=1;b<width;b=b+round(random(1,20))){
117:    int down=round(random(width/2));
118:    int across=round(random(width/2));
119:    line(xpos,ypos,across-b,down-b);
120:    line(xpos,ypos,across+b+xpos,down-b);
121:    line(xpos,ypos,across-b,width-down+b);
122:    line(xpos,ypos,across+b+xpos,width-down+b);}}
123:
124:void drawCircle(int diameter){
125:  ellipse(xpos, ypos, diameter-interval,  diameter);
126:  ellipse(xpos, ypos, diameter,  diameter-interval);
127:  ellipse(xpos, ypos, diameter,  diameter);
128:}