Scratch game proposal

The game I have decided to create is A spin off of space invaders. Space invaders was an arcade game originally released in 1978. I plan on either using some pixel art to create the space invader characters ( aliens and the rockets). The coding process would be trying to use what I learned to create it on my own, if not I can use a youtube tutorial. My plan is for the first  day design and create characters, second day continue working on characters and then work on background. Third day I begin to start coding and forth finish the game