how to apply on mutliple objects

FN crazyFunction splinesToDo =
(
   --your code here - CHANGE ALL $ to splinesToDo 
)
 
for s in shapes do crazyFunction s --for all shapes on scene
--OR --for s in selection where SuperClassOf s == shape do crazyFunction s --for all shapes among selected objects

delete myDummy

try (destroyDialog test) catch()
 
rollout test "happy function"
(
	local tabSplines = (for s in shapes collect s.name)
 
 
	multiListBox mlb_shapesList "Shapes on scene:" items:tabSplines height:tabSplines.count--selection:#(tabSplines.count) 
 
	button btn_selectAll "select All" width: 50 height: 21 pos:[12,mlb_shapesList.height+30]
	button btn_Main "Lets rock" pos:[btn_selectAll.pos.x+50,mlb_shapesList.height+30]
 
	FN fn_main shapeToDo=
	(
		gsl = getSegLengths shapeToDo 1 cum:false byVertex:false numArcSteps:1 
		heightspline = amax gsl as float
		mycylinder = cylinder radius:1 height:heightspline pos:(getKnotPoint shapeToDo 1 1)
		mydummy = dummy pos:(getKnotPoint shapeToDo 1 2)
 
		select mycylinder
		lookAtCon=lookAt_Constraint()
 
		showInterfaces lookAtCon --Look at the listener
		showProperties lookAtCon --Look at the listener
 
		lookAtCon.appendTarget mydummy 100
		lookAtCon.target_axisFlip=false
		lookAtCon.set_orientation=true
		lookAtCon.target_axis=2
 
		rotList=rotation_list()
		mycylinder.rotation.controller=rotList
		rotList.available.controller=lookAtCon
 
		select mycylinder
		snapshot mycylinder
		delete mycylinder
 
		delete mydummy
 
	)
 
	on btn_selectAll pressed do
	(
		mlb_shapesList.selection=(for i=1 to mlb_shapesList.items.count collect i)
	)
 
	on btn_main pressed do
	(
		tabZaznaczonych = mlb_shapesList.selection as Array
 
 
		for i=1 to tabZaznaczonych.count do
		(
			sceneObj = getNodeByName ((mlb_shapesList.items[(tabZaznaczonych[i])]) as String)
 
			fn_main sceneObj
 
		)
	)
)--rollout
	rof=newrolloutfloater "i need coffee...and beer :)" 200 300
	addrollout test rof

for h in helpers where h.category == #standard do delete h