function init()
	body = FindBody("practicetarget")
	trigger = FindTrigger("practice", true)
	light = FindLight()
	joint = FindJoint()
	mi, ma = GetJointLimits(joint)
	SetJointMotorTarget(joint, mi, 2)
	RemoveTag(body, "practicetarget")
	active = false
	armed = false
	SetLightEnabled(light, false)
end

function tick(dt)
	if IsPointInTrigger(trigger, GetPlayerCameraTransform().pos) then
		local current = FindBody("practicetarget", true)
		if current==0 and not active and math.random() < 0.01 then
			active = true
			armed = false
			SetJointMotorTarget(joint, ma, 2, 100)
			SetTag(body, "practicetarget")
			SetLightEnabled(light, true)
		end
		
		if active then
			local movement = GetJointMovement(joint)
			if movement > ma-0.1 then
				SetJointMotor(joint, 0, 0)
				armed = true
			end
			if armed and movement < mi+0.1 then
				active = false
				armed = false
				RemoveTag(body, "practicetarget")
				SetJointMotorTarget(joint, mi, 2)
				SetLightEnabled(light, false)
			end
		end
	else
		RemoveTag(body, "practicetarget")
		active = false
		armed = false
		SetJointMotorTarget(joint, mi, 2)
		SetLightEnabled(light, false)
	end
end