How do I update my code so that way if multiple occurrences of value 20 occurs it will print out those indexes

Question

values = [20, 50 , 20, 23, 252, 264, 664]

valueToSearch = 20

if valueToSearch in values:
    position = values.index(valueToSearch)
    print("Position found at index: ", position)

else:
    print("Value not found")