Lesson 2: Write your 2nd Google Spreadsheet App code

function changeBackgroundCell(){
  //13tErp8TBzuzM2PzMVv8UJPFRnreWP_uhWz3DEhHOi6A
  var ss = SpreadsheetApp.openById('13tErp8TBzuzM2PzMVv8UJPFRnreWP_uhWz3DEhHOi6A');
  ss.getRange('A1').setValue('Amazing Kent Lau');
  ss.getRange('A1').setBackground('green');
  
}