Create two conditions with multiple rounds

[sydneylevine]

• [x] High Universalizability Condition (3 rounds of high maps, 1 round of medium)
• [x] Low Universalizability Condition (3 rounds of low maps, 1 round of medium)

[WhiteJP]

Will be completed as part of https://github.com/nataliavelez/playable_lines/issues/12