//Float is a variable type that holds decimals.  It full name is "floating point"

float x; //The x position of the block
float y; //The y position of the block
float speedy; //The speed of the block in the Y direction

//Setting initial Values
void setup(){
  size(640,480);  
  x = 200;
  y = 250;
  speedy = 1;
}



void draw(){
  
  //Draw the background
  fill(0);
  rect(0,0,640,480);
  
  //Draw the block
  fill(255);
  rect(x,y,50,20);
  
  //Gravity--- OPTIONAL
 // speedy += 0.1;
  
  //Make the block use its speed
  y = y + speedy;
  
  
  //Check to bounce off the bottom
  if(y > 480){
    speedy *= -1; //Flip the sign of the current speed to reverse direction
  }
  
  //Check to bouce off the top
  if(y < 0){
    speedy *= -1;//Flip the sign of the current speed to reverse direction
    //speedy = speedy * (-1); Cause its the same as above
  }
}

//More on this later...
void keyPressed(){
 print(keyCode + " "); 
  
}