la = 0.3    # λ coefficient
dla = 0.05  # Δλ

while la >= 0:
    for k in range(10):
        for x in X:
            wm = Findclosest(W, x)[0]
            for i in range(len(wm)):
                wm[i] = wm[i] + la * (x[i] - wm[i]) 

    la = la - dla