Java Problem on Processing

[pedro_asacc03]

This code was supposed to create a ball, move it and bounce it in the walls of the Processing window. But it is not working. Do you guys know why? Link of the image of the code

 

[pedro_asacc03]

float x = 0;
float y = 0;
float rad = 20;
float vX;
float vY;

void setup(){
 size(1000,600);
 
}

void draw() {
  background(255,255,255);
  fill(0);
  circle(x,y,rad);
  movebounce(10,7);
}

void movebounce(float TempvX,float TempvY){
  vX=TempvX;
  vY=TempvY;
 
  x=x+vX;
  y=y+vY;
 
  if((x<=0) || (x>=width)){
 vX=vX * -1;   
  }
 
  if ((y<=0) || (y>=height)){
    vY=vY * -1;
  }
}