make a function for a black pen

add event listeneer to rainbow button

remove adding ids to every cell

add functionality to grid size button

add clear board function to clear button

add button for grid size

fix hover draw feature to be called when grid size is changed

add feature to change grid size according to slider value

add a function to remove all child nodes

fix method to update grid size text

fix method to update grid size text

add live grid size text according to input

add divs for grid size option

put options inside divs

add options bar