Combine two lists in a specific order : I am working in Python, and I want to combine two lists and have one list in the end, but in a specific way. Below I will just provide an example but the dataset I am working on is much bigger.

List 1

1.1

1.1

1.1

1.1

1.2

1.2

1.2

1.2

List 2

2.1

2.1

2.1

2.1

2.2

2.2

2.2

2.2


Combined List

1.1

1.1

1.1

1.1

2.1

2.1

2.1

2.1

1.2

1.2

1.2

1.2

2.2

2.2

2.2

2.2

Essentially, I want every 4 values to change the list I am importing values from. Take the first 4 from List 1 then take the next 4 from List 2, and then go back to List 1 etc. Any help would be welcome, thank you!