What is the author's style in Blue Surge by Rebecca Gilman?

To add tension to her play, Gilman uses oppositions. There are oppositional characters and themes. For example, there is the aloof and somewhat sophisticated Beth, who works with children to expand their artistic talents. She is well educated, well off financially, and, during the play, quite sexless. In opposition to her is Heather, who appears a bit light in the brain department, and who is represented as sex-personified through her profession, her conversation, and her ultimate pregnancy. While Heather teeters on the verge of disaster, seemingly following a path of least resistance, Beth has a definite plan of what she wants to do and how she intends to accomplish it.