Instructions

1. Check out the full YouTube painting tutorial here.
2. Add a few drops of black on the top 1/4 of the canvas, and a few drops of blue in the middle section of the canvas. Leave bottom 1/4 canvas blank.
3. Using your 3/4" flat wash brush, blend the paint on your canvas using horizontal back and forth strokes. Leave the bottom 1/4 of the canvas blank. When done blending the top of the canvas should be darker and gradually gets lighter towards the bottom. Let dry (3-5 minutes) or use a hairdryer for faster drying time.
4. Thin down some white paint with water so that it's a liquid consistency. Grab some liquid paint on any brush then start tapping it on the handle of another brush to create splatter stars. Move the brush around the canvas to fill the entire night sky.
5. Using a pencil and ruler trace in a fence shape on the bottom 1/4 of the canvas. You can also skip this step and just free-hand the fence design in the next step.
6. Mix brown paint by mixing equal parts yellow, red and blue to get a dark brown. Then mix in a bit of titanium white until you get a nice chocolate brown color.
7. Using the angled brush, apply the brown paint to the fence portion of the painting.
8. Add a tiny amount of black to the brown paint to make a darker brown for the wood grain pattern on the fence. Black is a highly pigmented paint so a little goes a long way. This darker shade of brown should have contrast to the brown in the last step. As long as you can see the contrast it works.
9. Using your angled brush, pick up some of the darker brown paint. Using the chiseled edge of the brush use light sweeping vertical strokes along the fence to create the wood grain pattern.
10. Mix an even darker shade of brown by adding a bit more black to the mix. Using the same angled brush add vertical lines to separate each fence panel. Optional: you can also add a top border to each of the triangular fence posts to give extra dimension. You can move to the next step while paint dries.
11. Using a pencil and a ruler trace in the shapes of the city skyline/buildings. A fun idea would be to find pictures of your own cities skyline and add in your cities building shapes.
12. Mix a medium grey paint by mixing 2 parts black to 1 part white. Using your angled brush fill in the building shapes with the grey paint.
13. Mix a pale yellow paint by mixing 3 parts white to 1 part yellow. Using your angled brush paint in the windows of the building. You can have fun here and paint in different window shapes. In fact, the more variation in window shapes you have the more interesting the painting looks also. Use squares, rectangles, circles, thin lines as some inspiration to your window shapes. And don't worry about making them perfectly straight/angular - just enjoy painting them :). You can move to the next step without paint fully drying.
14. The following 6 steps, you'll be painting the moon. For a detailed tutorial, check out this how to paint the moon post.
15. Trace a circular moon shape in the sky using a round object and a pencil. Alternatively you can skip this step and freehand painting in the moon.
16. Fill in the moon shape with white paint using the small round brush.
17. Mix some dark grey paint by mixing 2 parts white with 1 part black. Using the small round brush paint in the shapes in the picture below.
18. Mix a lighter grey paint by adding a small amount of white into the dark grey paint from above. Use a small round brush and use the light grey paint to outline around all the dark grey shapes (it’s okay if the all the paint is still wet, as it helped with blending). Wait for the paint to dry before the next step.
19. Paint some small speckled dots over the whole moon surface, using white paint on your smallest round brush. These will be your smallest craters.
20. Mix some more dark grey paint if you don’t have any left from step 15. This should be the darkest grey you’ve used for the moon. Using your small round brush paint rings around the “white specs” from the step above. You can also add some more of this dark grey paint in other parts of the moon in varying shapes/sizes. The more variations of grey you have, the more realistic the moon will look. The paint can still be wet to move onto the next step.
21. Now for the cats! Paint in an oval shape for the right cat’s body, using black paint and your small round brush.
22. Continuing with the black, paint in a circle shape on top of the oval - the cats head.
23. Paint 2 triangle shapes for the cats ears.Now for the cats legs! Paint in 2 ovals on either side of the bottom of the larger oval.
24. Now for the cats legs! Paint in 2 ovals on either side of the bottom of the larger oval.
25. Finally, paint in the cats tail in a fun squiggly shape. Cat #1 is done! 
26. For cat #2 repeat steps 19-23. You can also add in a couple of shooting stars into the sky as an optional touch, Use a white paint pen or a small round brush and white paint.
27. All done! Below is a quick infographic on the steps to paint a cat.