mandelbrot pseudo code

For each pixel on the screen do:
{
  x0 = scaled x co-ordinate of pixel (must be scaled to lie somewhere in the interval (-2.5 to 1)
  y0 = scaled y co-ordinate of pixel (must be scaled to lie somewhere in the interval (-1, 1)
  ESCAPE = 2*2

  x = 0
  y = 0

  iteration = 0
  MAX_ITERATION = 100

  while ( x*x + y*y <= ESCAPE  AND  iteration < MAX_ITERATION )
  {
    xtemp = x*x - y*y + x0
    y = 2*x*y + y0

    x = xtemp

    iteration = iteration + 1
  }

  if ( iteration == max_iteration )
  then
    color = black
  else
    color = iteration

  plot(x0,y0,color)
}