What should I paint for my wall art?

I want to make some wall art, i have the canvas and stuff, i just dk what to paint. My room is blue green and white. and its done in polka dots, but I dont want to just draw polka dots on the wall art. i want it to aquire more artistic abilty then that. you know. any suggestions?What should I paint for my wall art?
how about tall green grass with white stalks with blue flowers. or a different shade of green stalks with blue flowers with white center. and the behind the flowers u can see the blue sky.





or if you're into marine stuff, a scene of under water sea with blue water (duh) with white squiggles of waves and green algae/ kelp/ plant life rising up.





or u could just do abstract with diagonals of blue and green and even teal separated with white thin strip. it'll contrast with the polka dots. :)What should I paint for my wall art?
stencils....


theyre pretty