old_contents: export const CHANGE_SQUARE_COLOR = 'CHANGE_SQURE_COLOR'
  export const ADD_COLOR_TO_PALETTE = 'ADD_COLOR_TO_PALETTE'
  export const SET_CURRENT_COLOR = 'SET_CURRENT_COLOR'
  export const changeSquareColor = function(cordinate, color) {
    return { type: CHANGE_SQUARE_COLOR, cordinate }
  }
  
  export const addColorToPalette = function(color) {
    return { type: ADD_COLOR_TO_PALETTE, color }
  }
  
  export const setCurrentColor = function(color) {
    return { type: SET_CURRENT_COLOR, color }
  }
  
new_contents: export const CHANGE_SQUARE_COLOR = 'CHANGE_SQURE_COLOR'
  export const ADD_COLOR_TO_PALETTE = 'ADD_COLOR_TO_PALETTE'
  export const SET_CURRENT_COLOR = 'SET_CURRENT_COLOR'
  export const changeSquareColor = function(cordinate) {
    return { type: CHANGE_SQUARE_COLOR, cordinate }
  }
  
  export const addColorToPalette = function(color) {
    return { type: ADD_COLOR_TO_PALETTE, color }
  }
  
  export const setCurrentColor = function(color) {
    return { type: SET_CURRENT_COLOR, color }
  }
  
subject: remove color argument from changeSquareColor