Getting an explosion to play/spawn when a brick is touched?

Disclaimer: I am only using answers because it won't allow me to comment don't down vote because I didn't give an correct answer

I am not a expert but I think at the bottom before the end you should have some type of connection to connect to the function, It should go like this:

wall.CFrame = CFrame.new(75.5, -50.5, 8)

wall.Touched:connect(OnTouched) -- Because there is a bomb AND a wall Idk which one you would do sorry
end -- Some people do end) but I think right now end is just fine

I also found another Function connect system:

wall = game.Workspace.RocksideGlitchbombWall
bomb = game.Workspace.Glitchbomb
explosion1 = Instance.new("Explosion",bomb)

function OnTouched(bomb) -- Added the hit part 
    wait(.5)
    wall.CFrame = CFrame.new(75.5, 10.5, 8)
    wait(1)
    bomb.CFrame = CFrame.new(86, 20, -4)
    wait(1)
    bomb.Anchored = false
    wait(3)
    explosion1.BlastRadius = 30
    bomb.Transparency = 1
    wait(15)
    bomb.CFrame = CFrame.new(85, -40.874, -5)
    wall.CFrame = CFrame.new(75.5, -50.5, 8)
bomb.Touched:connect(OnTouched) -- Connecting to the "function OnTouched(bomb)"
end

So basically the first one was a connect(function - receiver method and second one was connectFirst(function - receiver which connects the function first before any other receiver, Idk if any of them works it is a suggestion, Like I said They won't let me use comments so I hope I helped