fixed holes in snake

src/App.vue

@@ -86,9 +86,14 @@ function moveSnake(x: number, y: number) {
 	if (snake.value.history.length > length) {
 		const currentLength = snake.value.history.length
 		const allowedLength = snake.value.length
-        const toDelete = snake.value.history.slice(0, currentLength - allowedLength)
-        for (const cell of toDelete) {
-            cell.color = 'white'
+
+		if (currentLength > allowedLength) {
+			const toDelete = snake.value.history.shift()
+
+			if (toDelete !== undefined) {
+				toDelete.color = 'white'
+			}
+
 		}
 	}
 }