Google Sheets: Background cell color changes

Good day experts,

I would like to ask for some help on color of a cell changes automatically when the color of a cell from another sheet changes:

Example:

Sheet1!C7 to change color automatically whenever the color in Sheet2!A3 changes.

Sheet1!C5 to change color automatically whenever the color in Sheet2!A4 changes.

Sheet1!A2 to change color automatically whenever the color in Sheet2!A5 changes.

Sheet1!A7 to change color automatically whenever the color in Sheet2!B1 changes.