Arkaplan resminin urlsi şu olması lazım:
https://4.bp.blogspot.com/-TsxZuyiIqqA/W7zbCHAwQJI/AAAAAAAAEgw/Vjj6X4K0NmcLU-Km0k7eWlrxWeBSaK56QCLcBGAs/s1600/main-bg-tree.png