Step 1: Creating the Barrel

Written Instruction

Create a cylinder, name it “Barrel”, rotate it so that it can roll on the ground, and make its size: (6,12,3)

Give it the texture “Wood Plank” and the Brickcolor “CGA Brown”.

Under Properties, enable the Barrel’s CustomPhysicalProperties and set the following setttings:

Create a ramp, and place the barrel on top of it. Make sure to delete any welds between the ramp and the barrel. If the barrel rolls down and continues moving, you can move on to the next step.

Now we need to make it so that the barrel explodes when it touches a player or another barrel.

Create a wall directly infront of the barrel’s path called “Delete”. Any barrel touching this will be destroyed. Color this wall a distingue color.

Create a script named “Explode” under the barrel.

Explode

local Barrel = script.Parent

--[[
When the barrel is touched by either a player or another barrel, the script does the ff: 
    Creates an explosion on the barrel's current position (with the intention of killing the player)
    Destroys the barrel 

If the barrel touches the end of the course ("Delete"), the barrel is deleted to not waste computer performance on useless objects.  

--]]



Barrel.Touched:Connect(function(otherPart)
    if otherPart.Parent:FindFirstChildOfClass("Humanoid") or otherPart.name == "Barrel" then  
        local Explosion = Instance.new ("Explosion", Barrel)
        Explosion.Parent = Barrel
        local BarrelPivot = Barrel:GetPivot()
        Explosion.Position = Vector3.new (BarrelPivot.X, BarrelPivot.Y, BarrelPivot.Z)
        Explosion.BlastPressure = 50
        Explosion.BlastRadius = 5
        Explosion.ExplosionType = Enum.ExplosionType.NoCraters
        wait(0.5)
        Barrel:Destroy()
    else if otherPart.name == "Delete" then
            Barrel:Destroy()
        end 
    end
end)

Now that your done with the script, make sure that the barrel explodes when you or another player touches it. Also test if the barrel is destroyed when it touches the “Delete” wall.

In your obstacle course, the barrel can sometimes stop and stay in place. To prevent this obstacle from hindering the gaming-experience, we will implement a system where the barrel explodes if it is not moving.

Create a script under barrel called “Timer”

Timer

local Barrel = script.Parent
local SavedPosition = Barrel.Position

--[[
The timer code prevents barrels from being completely stationary for long periods of time. 
Stationary barrels block the player's path and hinders the gaming experience. 

Every second, checks if the barrel is moving. 
It does this by checking if the barrel's current position is equal to its position 2 seconds ago. 
Once it does this, it does the ff: 

    A loop that lasts 100 steps changes the barrel's color from red to brown to red again repeatedly. The interval
    between each color change gets smaller as more steps occur. 

    After these steps have passed, an explosion is created on top of the barrel and destroys it shortly after.  

--]]

while wait(1) do 
    SavedPosition = Barrel.Position
    wait (2)
    if SavedPosition == Barrel.Position then 
        for i=1, 100, 1 do
            wait (0.05-(i*0.005))
            if Barrel.Color ~= Color3.new(1, 0, 0) then 
                Barrel.Color = Color3.new(1, 0, 0)
            else
                Barrel.Color = Color3.new(0.415686, 0.223529, 0.0352941)
            end
        end
        local Explosion = Instance.new ("Explosion", Barrel)
        local Pivot = Barrel:GetPivot()
        Explosion.Parent = Barrel
        Explosion.Position = Vector3.new (Pivot.X,Pivot.Y,Pivot.Z)
        Explosion.BlastPressure = 50
        Explosion.BlastRadius = 5
        Explosion.ExplosionType = Enum.ExplosionType.NoCraters
        wait (0.5)
        Barrel:Destroy()
    else
        --print ("RecentMovement = True")
    end
end

Test if the barrel explodes if it is standing still. If it is, you are done creating the barrel! Now we need to create a mechanism that spawns multiple