bleeding

-- Main variables

local hitbox = script.Parent
canDamage = true
canEffect = true

-- Configurations

damage = 5
reload = 0.75
effectChance = 2 --/10

-- Attack

hitbox.Touched:connect(function(hit)
    if (hit.Parent.ClassName == "Model") then
        if (hit.Parent:FindFirstChild("Humanoid")) then
            if canDamage then -- `canDamage == true` is the same thing as `canDamage`
                hit.Parent.Humanoid:TakeDamage(damage)
                print(hit.Parent.Name .. " took " .. damage .. " damage")

                local randomEffectChance = math.random(1, 10)
                print("The number of randomEffectChance = " .. randomEffectChance)
                if randomEffectChance <= effectChance then -- slightly more concice way
                    if canEffect then -- We don't need to check `canDamage` here, because we already checked it above
                        canEffect = false
                        print(hit.Parent.Name .. " got an effect")
                        for i = 1, 20, 1 do
                            hit.Parent.Humanoid:TakeDamage(1)
                            print(hit.Parent.Name .. " is taking 1 damage")
                            wait(1)
                        end
                        canEffect = true -- We never actually reset this before
                    end
                end

                canDamage = false
                wait(reload)
                canDamage = true
            end
        end
    end
end)