Blender3D script to generate and animate bouncing cubes

bounce_random_cubes.py

import bpy
import random

# Reference: https://www.youtube.com/watch?v=r8hqLh_HE08

# After running the script, go to the Animation tab and hit SPACE to run the animation

def delete_all_cubes():
    # Select all cubes by name
    for o in bpy.context.scene.objects:
        #if o.type == 'MESH':
        if o.name.startswith('Cube'):
            o.select_set(True)
        else:
            o.select_set(False)
    # Call the delete operator only once
    bpy.ops.object.delete()

def generate_cubes():
    SPACING=2.5
    for x in range(5):
        for y in range(5):
            bpy.ops.mesh.primitive_cube_add(size=2, enter_editmode=False, align='WORLD',
              location=(x * (SPACING), y * (SPACING), random.random() * 2), scale=(1, 1, 1))
            item = bpy.context.object # Get last object made
            
            # Set keyframes to animate the cubes
            original_z = item.location[2]            
            item.keyframe_insert(data_path="location", frame=1)
            item.location = (item.location[0], item.location[1], -1)
            item.keyframe_insert(data_path="location", frame=12)
            item.location = (item.location[0], item.location[1], original_z)
            item.keyframe_insert(data_path="location", frame=24)
            
            # Pick one of 2 random textures (Go make the textures yourself)
            if random.random() < 0.2:
                item.data.materials.append(bpy.data.materials['Material.002'])
            else:
                item.data.materials.append(bpy.data.materials['Material.001'])        

# Main
delete_all_cubes()
generate_cubes()