diff --git a/conway.go b/conway.go
index 816db99..9429b85 100644
--- a/conway.go
+++ b/conway.go
@@ -61,11 +61,12 @@ func initGrid(width, height int, parent ...[][]Cell) ([][]Cell, error) {
 
 var grid [][]Cell
 
-func setup(callback func([][]Cell), width, height, FPS int) chan bool {
+func setup(callback func([][]Cell), width, height int, FPS time.Duration) chan bool {
+	// Initialize grid
 	grid, _ = initGrid(width, height)
 
 	// Prepare ticker and finishing flag
-	ticker := time.NewTicker(time.Second / time.Duration(FPS))
+	ticker := time.NewTicker((1000 / FPS) * time.Millisecond)
 	done := make(chan bool)
 
 	// Run game loop