code: func Reset() {
  	canvas.width, canvas.height = term.Size()
  	canvas.clipX, canvas.clipY = 0, 0
  	canvas.clipW, canvas.clipH = canvas.width, canvas.height
  	canvas.textColor = ColorWhite
  	canvas.backColor = ColorBlack
  
  	canvas.attrStack = make([]attr, 0)
  	canvas.clipStack = make([]rect, 0)
  }
docs: // Reset reinitializes canvas: set clipping rectangle to the whole
  // terminal window, clears clip and color saved data, sets colors
  // to default ones