Just copy the URL That I had given below each image

If you want to save it : Right click --> Save image as...

Header URL :

 https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEjmlN9YieyjepQx1uYKidNUv1HEwiYBz7tkQHGHgI3_kBEt6F03wOKs70SYCvgW0qohtb1tNXgTI12mQ-FccozaBCYX6t3Mwq86qPTjRk9urM2PYHvMt4kWGRQmbpwdEpzne4Sr9c2tgwg/s1600/Header+custom+p.png

Background URL :

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEgGd1wCqb5wMfPN0d4gqJzH1geyGn3tXG0sjy19OXspF-EVArG02nKC9fyrLl9U3xQGzuT6IrrkjH0loptAX6IHixi1BGieNC3WimoKjEByUgoPP-xrinMZRnDojUEOdINCfpy2yTr4yzE/s1600/Background+1.png

Footer URL :

https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEhlneWeltO1UNRzKVbBrw9iG624BNR6LXp4YGDvQf_wUlE2XCo-3qM3ZgcCiUYYRFEJZ9_3mpAJmKky01x69jyoR2bd6wRLabm2lhEIRzwMUiup-bCs0cH19LsuPFqSgkNSGh8A2_zbZGQ/s1600/footer+p.png