feat: add step counter.

Based on discussions on bubbletea github for when I got into issues with
view.

https://github.com/charmbracelet/bubbletea/discussions/1343#discussioncomment-12376381

main.go

@@ -18,6 +18,7 @@ const (
 type gol struct {
 	grid   [ROW][COL]int
 	buffer [ROW][COL]int
+	step   int
 }
 
 // Create array that holds field's to check for neighbours
@@ -47,11 +48,11 @@ func (g gol) Init() tea.Cmd {
 	return nil
 }
 
-// Check neighobours
+// Check neighbours
 func (g gol) countNeighbours(x int, y int) int {
 	n := 0
 	for i := 0; i < 8; i++ {
-		if g.buffer[x+CHECK_ARRAY[i][0]][y+CHECK_ARRAY[i][1]] == 1 {
+		if g.grid[x+CHECK_ARRAY[i][0]][y+CHECK_ARRAY[i][1]] == 1 {
 			n += 1
 		}
 	}
@@ -63,7 +64,7 @@ func (g gol) Life() tea.Model {
 	for i := 1; i < ROW-1; i++ {
 		for j := 1; j < COL-1; j++ {
 			n := g.countNeighbours(i, j)
-			if g.buffer[i][j] == 1 {
+			if g.grid[i][j] == 1 {
 				if n < 2 || n > 3 {
 					g.buffer[i][j] = 0
 				}
@@ -74,6 +75,8 @@ func (g gol) Life() tea.Model {
 			}
 		}
 	}
+	g.grid = g.buffer
+	g.step++
 	return g
 }
 
@@ -86,8 +89,7 @@ func (g gol) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 		case "ctrl+c", "q":
 			return g, tea.Quit
 		case " ":
-			g.Life()
-			return g, nil
+			return g.Life(), nil
 		}
 	}
 	return g, nil
@@ -95,7 +97,7 @@ func (g gol) Update(msg tea.Msg) (tea.Model, tea.Cmd) {
 
 // Let's draw this all simply
 func (g gol) View() string {
-	var s string
+	s := fmt.Sprintf("Step: %d\n", g.step)
 	// Making sure to not draw the empty field around the array
 	for i := 1; i < ROW-1; i++ {
 		for j := 1; j < COL-1; j++ {