code: func Symbol(x, y int) (term.Cell, bool) {
  	if x >= 0 && x < canvas.width && y >= 0 && y < canvas.height {
  		cells := term.CellBuffer()
  		return cells[y*canvas.width+x], true
  	}
  	return term.Cell{Ch: ' '}, false
  }
docs: // Symbol returns the character and its attributes by its coordinates