Evolution of the stellar and gas distribution of an embedded cluster, including stellar evolution and feedback from stellar winds and supernovae. Snapshots are labelled with their time in the lower right corner. Shown as a density plot is a slice through the midplane of the gas density. Stars are divided in 4 mass bins: m_⋆ ≤ 0.9  M_⊙ (smallest red dots), 0.9  M_⊙ ≤ m_⋆ ≤ 2.5  M_⊙ (intermediate yellow dots), 2.5  M_⊙ ≤ m_⋆ ≤ 10  M_⊙ (intermediate green dots) and m_⋆ ≥ 10  M_⊙ (large light blue dots). From Pelupessy & Portegies Zwart (2012).