How do I iterate a list that is inside a dictionary?

I have a dictionary and each element in it contains a list, I would like to use the dictionary key to find the list and iterate over the list.

my dictionary:

1 [2,4]

2 [1, 5]

3 [5, 6]

4 [1, 5]

5 [2, 3, 4, 6]

6 [3, 5]

i want a for loop that iterate in the selected list so i can do an action with the index of the "for" replacing its value with the value of the loop index (doing this for each index).