Programming 102: Selecting random teams

from random import choice

left_holding = []
right_holding = []
pens = ['Red', 'Orange', 'Yellow', 'Green', 'Blue', 'Indigo', 'Violet', 'Black', 'White', 'Grey']

def add_pen_to_hand(hand):
    pen_picked = choice(pens)
    hand.append(pen_picked)
    pens.remove(pen_picked)

repeats = len(pens)
for x in range(int(len(pens)/2)):
    add_pen_to_hand(left_holding)
    add_pen_to_hand(right_holding)

print("\nYour left hand is holding these colour pens\n", left_holding)
print("\nYour right hand is holding these colour pens\n", right_holding)
print()