Hello, im newbie here and i have no idea how to do this. I want to make a program when I click button 1, button 1 background colour will change to blue but the others doesn’t change. If I click button 2 when button 1 already in blue colour, button 2 will change to blue colour and button 1 will revert to original colour. And same goes to the other button. Thank you.
Use block when button 1 is clicked to change background color of button 2 to any color you want.
@ahmadruzaini1998x8ra take a look at this video response to your question:
There are a couple of ways to do it, but I’d recommend going with the scalable approach.
The remix link is in the video description!
Thank you so muchhhhh. Solve my problem 
No problem at all @ahmadruzaini1998x8ra - it was an interesting question.
There’s also a more in-depth tutorial over on the blog: