Liquid-liquid phase separation (LLPS) is a key process through which cells can spatially compartmentalize macromolecules. Some proteins associated with the nucleation of cytoskeletal filaments, such as actin, can form phase-separated droplets in vitro, and actin growth leads to deformation of these droplets. Recently, we have developed a platform through which an actin nucleation promoter can be targeted to artificial phase-separated RNA-polypeptide droplets; growing actin filaments self-assemble into criss-crossing rings within the droplets, and bundles outside of it. On the other hand, the host team has also developed a minimal molecular system where polymerizing actin filaments and various myosin motors (myosin II, V, and X) self-assemble into filament bundles that undergo a wave-like beating similar to the beating of sperm flagella (Pochitaloff et al., Nat. Phys., 18:1240 (2022)). So far, these beating bundles can be anchored to the surface of a glass coverslip or of a polystyrene microbead. In this internship, we propose to explore how myosin motor activity may lead to the remodeling of liquid droplets from which actin filaments are growing. A possible goal is to observe the beating of droplet-anchored bundles, which could be compared qualitatively and quantitatively to microbead-anchored bundles. Another possibility is the observation of actin ring remodeling and contraction in a manner reminiscent of the closure of the cytokinetic ring during cell division.