// 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(30);
fill(127);
text("Your sidewalk", 20, 50);
text("Neighbour", 350, 50);

// let's shovel the snow
fill(0);   
stroke(127);

// keep a counter for each section we shovel
// and we'll print this number on each 
// section that has snow removed
int count = 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);
  count = count + 1;

  fill(250);        // change colour for text
  text(count, x-15,y+15); // print number
  fill(0);          // change colour back

  x = x + 50;
}

// shovel bottom half of snow

// why do we need this next line?
// x = x - 50;    // better update x position!!
//

y = 175;       // move down to bottom half

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

  count = count + 1;
  fill(250);        // change colour for text
  text(count, x-15,y+15); // print number
  fill(0);          // change colour back
  x = x - 50;
}