...Like a whiteboard with a clear plastic overlay

This will show on browsers that do not support Canvas (IE8-, Opera Mini)

  1. 'Context' is the clear plastic overlay
  2. Use drawing (path) methods (arc, rect, line, etc) to draw to Canvas's buffer
  3. Use render methods (fill, stroke, etc) to draw whatever is in the buffer
  4. context.beginPath() clears the buffer
  5. context.clearRect() clears the screen