Assuming you would like tips on how to paint a white rabbit on green grass:
One approach is to start by painting the rabbit white. Then, after the white has dried, you can add some green paint to the grass around the rabbit. To make the rabbit stand out, you may want to add some shading or other details in dark colors.
Another approach is to start by painting the grass green. Then, after the green has dried, you can add the white rabbit. You can add shading or other details in dark colors to make the rabbit stand out.
Which approach you take will depend on your personal preference and the effect you are going for. Experiment and see what works best for you!