// Day 4: 
// Example: snow removal the better way
// mjh-2013

// initialize program
size(600, 400);
background(255);
strokeWeight(10);
stroke(0);

// draw sidewalk and border with neighbour
line(10, 100, 590, 100);
line(10, 200, 590, 200);
stroke(227, 0, 0);
line(350, 75, 350, 225);
textSize(40);
fill(127);
text("Your sidewalk", 20, 50);
text("Neighbour", 350, 50);

// let's shovel the snow
fill(0);   

// we can declare and initialize 2 or more
// varables at the same time (if they are the 
// same type)
int x = 25, y = 125;

// shovel top half of snow
while ( x < 350 ){
  ellipse(x,y,50,50);
  x = x + 50;
}

// shovel bottom half of snow
x = x - 50;    // better update x position!!
y = 175;       // move down to bottom half

while ( x > 0 ){
  ellipse(x,y,50,50);
  x = x - 50;
}