For this assignment, I used the L-system in Houdini to create a cherry tree based on the following reference. I also create a island-like terrian, a solid-color background and clouds.

Premise: X
Rule 1: X = F(0.05)+(40)F(0.4)-(60)F-(10)FF[-(20)F(0.2)A]F-(5)[+(45)FB]F+(15)FC
Rule 2: A:t<8 = T~(1)"(0.9);F(0.05)[+FA]/(80)[+F(0.08)A]/(150)[+A]
Rule 3: B:t<9 = T~(8)"F;[+B]/(90)[+FB]/(160)[+FB]
Rule 4: C:t<9 = T~(10)"F;[+C]/(100)[+FC]/(180)[+FC]
Rule 5: A:t>8 = J
Rule 6: B:t>9 = J
Rule 7: C:t>9 = J

Generation = 1	Generation = 2

Generation = 6	Generation = 10

1. Seperate the leaves from l-system

2. Delete the geometry but keep the points

3. Add a copytopoints node with a sphere as the geometry to copy

4. Jitter the points by adding a pointjitter node

5. Add another copytopoints node with a grid as the geometry to copy

6. Set color