void setup()
{
   size(300,300);
 }
 int step=1;
 int r=255;
 int s=0;
 int t=0;

float x=0.0;
float y=0.0;

void draw()
{
  background(0);
  
//�?
  
  stroke(255,255,255); 
  line(0,150,300,150);
  line(150,0,150,300);
  
  fill(r,s,t);
  stroke(r,s,t);
  
//動き
  
  y=-((x-150)*(x-150)*(x-150)+(x-150)*(x-150)+(x-150))/15000+150;
  ellipse(int(x),int(y),10,10);
  
  
 
  
  x=x+step;
  
 if(width<x)
 {
   step = -step;
 }
 if(x<0)
 {
   step = -step;
 }
 
  

//色

  t=t+1;
  
  
  r=r-1;
  
  if(150>x)
  {
    s=s+2;
  }
  
  if(150<x)
  
{
s=s-2;
}


noCursor();

if (mousePressed == true)
{
  x = mouseX;
  y = mouseY;
  line(x-10,y-10,x+10,y+10);
  line(x-10,y+10,x+10,y-10);
}


}