void setup(){
  size(400,400);
  strokeWeight(1);
}

float px = 200;
float p1x = 60;
float p2x = 100;
float p3x = 140;
float p4x = 180;
float p5x = 220;
float p6x = 260;
float p7x = 300;
float p8x = 340;
float p9x = 380;
float speed = 2;
float distance = 60;
float resolution=20;

void draw(){
  background(200);
  translate(0, height/2);  
  beginShape(POINTS);
  strokeWeight(2);

  stroke(0);

  vertex(px,0);
  vertex(p1x,0);
  vertex(p2x,0);
  vertex(p3x,0);
  vertex(p4x,0);
  vertex(p5x,0);
  vertex(p6x,0);
  vertex(p7x,0);
  vertex(p8x,0);
  vertex(p9x,0);
  endShape(); 


  beginShape();
  noFill();
  strokeWeight(1);
  stroke(170);
  for(int i = 0; i <= resolution; i++){
    float angle = i/resolution * TWO_PI;
    float x = distance * cos(angle); 
    float y = distance * sin(angle); 
    vertex(x,y);
  }
  translate(px,0);
  endShape();

  float dist1x = dist(px,0, p1x,0);
  float dist2x = dist(px,0, p2x,0);
  float dist3x = dist(px,0, p3x,0);
  float dist4x = dist(px,0, p4x,0);
  float dist5x = dist(px,0, p5x,0);
  float dist6x = dist(px,0, p6x,0);
  float dist7x = dist(px,0, p7x,0);
  float dist8x = dist(px,0, p8x,0);
  float dist9x = dist(px,0, p9x,0);


  if(keyCode== RIGHT & keyPressed){
    px += speed;
  }
  if(keyCode== LEFT & keyPressed){
    px -= speed;
  }

  if(dist1x < distance & keyCode == RIGHT & keyPressed){
    p1x +=  sin(map(dist1x,0,distance,PI/2,PI))*speed;
  }
  if(dist1x < distance & keyCode == LEFT & keyPressed){
    p1x -=  sin(map(dist1x,0,distance,PI/2,PI))*speed;
  }
  if(dist2x < distance & keyCode == RIGHT & keyPressed){
    p2x +=  sin(map(dist2x,0,distance,PI/2,PI))*speed;
  }
  if(dist2x < distance & keyCode == LEFT & keyPressed){
    p2x -=  sin(map(dist2x,0,distance,PI/2,PI))*speed;
  }
  if(dist3x < distance & keyCode == RIGHT & keyPressed){
    p3x +=  sin(map(dist3x,0,distance,PI/2,PI))*speed;
  }
  if(dist3x < distance & keyCode == LEFT & keyPressed){
    p3x -=  sin(map(dist3x,0,distance,PI/2,PI))*speed;
  }
  if(dist4x < distance & keyCode == RIGHT & keyPressed){
    p4x +=  sin(map(dist4x,0,distance,PI/2,PI))*speed;
  }
  if(dist4x < distance & keyCode == LEFT & keyPressed){
    p4x -=  sin(map(dist4x,0,distance,PI/2,PI))*speed;
  }
  if(dist5x < distance & keyCode == RIGHT & keyPressed){
    p5x +=  sin(map(dist5x,0,distance,PI/2,PI))*speed;
  }
  if(dist5x < distance & keyCode == LEFT & keyPressed){
    p5x -=  sin(map(dist5x,0,distance,PI/2,PI))*speed;
  }
  if(dist6x < distance & keyCode == RIGHT & keyPressed){
    p6x +=  sin(map(dist6x,0,distance,PI/2,PI))*speed;
  }
  if(dist6x < distance & keyCode == LEFT & keyPressed){
    p6x -=  sin(map(dist6x,0,distance,PI/2,PI))*speed;
  }
  if(dist7x < distance & keyCode == RIGHT & keyPressed){
    p7x +=  sin(map(dist7x,0,distance,PI/2,PI))*speed;
  }
  if(dist7x < distance & keyCode == LEFT & keyPressed){
    p7x -=  sin(map(dist7x,0,distance,PI/2,PI))*speed;
  }
  if(dist8x < distance & keyCode == RIGHT & keyPressed){
    p8x +=  sin(map(dist8x,0,distance,PI/2,PI))*speed;
  }
  if(dist8x < distance & keyCode == LEFT & keyPressed){
    p8x -=  sin(map(dist8x,0,distance,PI/2,PI))*speed;
  }
  if(dist9x < distance & keyCode == RIGHT & keyPressed){
    p9x +=  sin(map(dist9x,0,distance,PI/2,PI))*speed;
  }
  if(dist9x < distance & keyCode == LEFT & keyPressed){
    p9x -=  sin(map(dist9x,0,distance,PI/2,PI))*speed;
  }


  if( px > 400){
    px = 200;
    p1x = 60;
    p2x = 100;
    p3x = 140;
    p4x = 180;
    p5x = 220;
    p6x = 260;
    p7x = 300;
    p8x = 340;
    p9x = 380;
  }
}