Hi, im doing this type of, but i keep getting syntax errors and cant find what it is.
Thanks for any help.


int num_balls = 50;
boolean[] color_change;
int[] xpos;
int[] ypos;
int[] xspeeds;
int[] yspeeds;

void setup(){
 size(900,800);

 
 xpos = new int[num_balls];
  ypos = new int[num_balls];
  xspeeds = new int[num_balls];
  yspeeds = new int[num_balls];
 
 for(int i = 0 ; i < num_balls; i++){
   xpos[i] = (int)random(0, width);
   ypos[i] =  (int)random(0,200);
   xspeeds[i] = (int)random(12,13);
   yspeeds[i] = (int)random(12,13);

color_change[i] = false;

 }
}

void draw(){
   background(0);
  


   if (mousePressed==true)
   {stroke(255,0,0);
   line(mouseX,565,mouseX,0);}
   else{stroke(0);
 if(mouseX>xpos[i]-10&&mouseX<xpos[i]+10){
     color_change[i]=true;
  }
  if(color_change[i])  {
      fill(0) ;
  }  else {
      fill(255);
  }
}
   noStroke();
  
  
  for(int i = 0 ; i < num_balls; i++){
     xpos[i] = xpos[i] + xspeeds[i];
     ypos[i] = ypos[i] + yspeeds[i];
     if( xpos[i] > width || xpos[i] < 0){
      xspeeds[i] = xspeeds[i]* -1;
     }
     if( ypos[i] > 200|| ypos[i] < 0){
      yspeeds[i] = yspeeds[i]* -1;
     }


     ellipse(xpos[i], ypos[i], 30,30);
   }
   triangle(mouseX-8, 580, mouseX+8, 580, mouseX, 565);

}