I want my image to show two sisters, one and the other , with their backs turne

I want my image to show two sisters, one and the other , with their backs turned as if they were entering a light blue portal-type door. The 1 sister has long wavy hair down to her elbows and is wearing a water-green dress that reaches below her knees, and the sister has long, straight hair down to her elbows and with bangs, she is wearing a pink dress that reaches below her knees.