bakcground problem

Dear Sir

We have problem for background setup.

Please check below picture,it show in PC and we think the joint part is right.

https://nutrilism.com/wp-content/uploads/2016/11/pc.jpg

But in the mobile,it show like below.the background pictures repeat again and again.

https://nutrilism.com/wp-content/uploads/2016/11/556793134215370949.jpg
https://nutrilism.com/wp-content/uploads/2016/11/33612349493243948.jpg

Could you please tell us how to show in mobile like in PC style?

Thanks for your help.