How is it possible to explode one part and then another?

Alright, so I'm making a pinewood type of game and I tried doing this code:

game.Workspace.TenToZero.Value.Changed:connect(function()
if game.Workspace.TenToZero.Value.Value == true then
	while true do
		game.Workspace.Part.Anchored = false
		expa.Position = game.Workspace.Part
		expa.Parent = script.Parent.Position
		expa.BlastPressure = 9999999
		wait(0.4)
		end
	end
end)

I'm trying to make this explode one part and then go to another, but it doesn't work properly. Is there a way to fix this?

Use a for loop with pairs.

for i, v in pairs(Workspace:GetChildren()) do
    if v:IsA("BasePart") then
        local e = Instance.new("Explosion")
        e.Position = v.Position
        e.BlastRadius = 10
        e.BlastPressure = 1e6

        e.Parent = Workspace
    end
end