In fact, the format of the program has already been reflected in your poems. It is recommended that you do not overdo the stage scheduling. Poetry recitation is a language program for quiet appreciation and taste, and the actors are active on the stage. Too often will affect the audience's appreciation.
If your conditions permit, you can consider not chasing the light, but instead using "fixed point lights" (i.e. computer lights). The four vertex lights light up in sequence according to the order in which the actors open their mouths. The four actors can Arranged in an inverted 'trapezoid' shape. Use warm colors for the front two bunches and cool colors for the back.
This artistic conception is very consistent with your poetry