IEnumerator IlluminateRoadCells(List <int> cellIndices) { WaitForEndOfFrame nextFrame = new WaitForEndOfFrame(); for (int k = 0; k < cellIndices.Count; k++) { map.SetCellColor(cellIndices [k], new Color(1, 1, 0, 0.5f)); yield return(nextFrame); } for (int k = 0; k < cellIndices.Count; k++) { map.ClearCell(cellIndices [k]); yield return(nextFrame); } }