moduloUI.py

from vanilla import Window, RadioGroup, SquareButton

class ExampleCtrl(object):
    ledsAmount = 6
    index = 0
    
    def __init__(self):
        self.w = Window((150, 150), '% modulo')
        self.w.someLeds = RadioGroup((20, 20, -20, -20),
                                     [""]*self.ledsAmount,
                                     callback=self.radioGroupCallback)
                                     
        self.w.up = SquareButton((-60, 20, 40, 40), "↑",
                                 callback=self.upCallback)

        self.w.dw = SquareButton((-60, -60, 40, 40), "↓",
                                 callback=self.dwCallback)

        self.w.open()
        
    def radioGroupCallback(self, sender):
        print(sender.get())
        
    def upCallback(self, sender):
        self.index -= 1
        self.w.someLeds.set(self.index % self.ledsAmount)
    
    def dwCallback(self, sender):
        self.index += 1
        self.w.someLeds.set(self.index % self.ledsAmount)

ec = ExampleCtrl()