Hello. I am a beginner and I would like to know how to encorporate mouse interaction (either repel or attract) to the swirl I have set up. Is is possible to do this? If so how can I? Any advice would be awesome. Also, how can I change the color of the lines? I dont know which piece of code that is.

 

Heres the code:

 

PGraphics tunnel;
 int value=323;
 
void setup(){
  size(400,400,P2D);

  frameRate(18);
  rectMode(CENTER);
  noFill();
  stroke(25,220,43,433);
  smooth();

 tunnel = createGraphics(width+20,height+20,JAVA2D);
 tunnel.beginDraw();
 tunnel.smooth();
 tunnel.noFill();
 tunnel.strokeWeight(5);
 //calling PG tunnel (variables)
}
void draw(){
  background(20);

 
pushMatrix();
  translate(random(-7,5),random(-7,5));
 //creates tension of the tunnel moving
 //allows it to shake on both x and y axis
 
  for(int i = 2;i<800;i+=4){
    //iterated rectangles that form the strokes that appear to be the "tunnel"
    stroke(23,23,45,633);
    pushMatrix();
    translate(width/2,height/2);
    rotate(frameCount*(1.0+i/570.0*noise(frameCount/300.0)));
    //controls the initial tunnel image to move back and fourth
    //framecount counts the number of frames since the sketch started
    stroke(255,noise((frameCount-i)/60.0)*250);
    rect(0,0,2+i,2+i);
    popMatrix();
  }
 
  
  popMatrix();
 
 pushStyle();
  //creates rectangles into appeared tunnel (with POP)
  strokeWeight(10);
  stroke(0);
   noFill();
   
  rect(width/2,height/2,width,height);
  //rectangles that from iterated lines
  popStyle();
 
}
void mousePressed()
{
  value = value + 5;
  if (value > 255) {
    value = 0;

 

  }

}