Bubble sort in GDScript (Godot Engine 2.1)

I was needed to sort some game objects by position on the screen. There are a lot of sorting algorithms, and simplest one is the Bubble Sort algorithm. It works fine for me because I have the small count of objects to sort. 
There is the code example in GDScript that sorts simple array of numbers:

	var notes = [7,2,5,1]
	print("notes:", notes)
	for i in range(notes.size()-1, -1, -1):
	#print("i:", i)
	for j in range(1,i+1,1):
	#print("J:", j)
	if notes[j-1] > notes[j]:
	var temp = notes[j-1]
	notes[j-1] = notes[j]
	notes[j] = temp
	print("sorted notes:", notes)
	#output:
	#notes:[7,2,5,1]
	#soreted notes:[1,2,5,7]

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