Bubble sort in GDScript (Godot Engine 2.1)

gistfile1.txt

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]