Add a CPUParticles2D node
Set Show Behind Parent to ON
Set Emmission Shape to Rectangle
Click the graph to add points
You will see the gradient editor
Rectangles from left to right represent:
Click the first Rectangle
Now pick an orange colour
From the far-right rectangle
Repeat for the second rectangle
Update the get input function
To turn the booster on and off
Add a CPUParticles2D node
Set Texture to corona.png
Set Emission Shape to Sphere
Set Show Behind Parent to ON
Set Scale Amount Max to 0.1
Add a New CanvasItemMaterial
CONGRATULATIONS ON COMPLETING THE TUTORIAL