diff --git a/15_day/bootpack.c b/15_day/bootpack.c
index d2c2e5d..5d51fe4 100644
--- a/15_day/bootpack.c
+++ b/15_day/bootpack.c
@@ -285,8 +285,8 @@ void make_textbox8(struct SHEET *sht, int x0, int y0, int sx, int sy, int c)
 void task_b_main(struct SHEET *sht_back)
 {
 	struct FIFO32 fifo;
-	struct TIMER *timer_ts, *timer_put;
-	int i, fifobuf[128], count = 0;
+	struct TIMER *timer_ts, *timer_put, *timer_1s;
+	int i, fifobuf[128], count = 0, count0 = 0;
 	char s[12];
 
 	fifo32_init(&fifo, 128, fifobuf);
@@ -295,7 +295,10 @@ void task_b_main(struct SHEET *sht_back)
 	timer_settime(timer_ts, 2);
 	timer_put = timer_alloc();
 	timer_init(timer_put, &fifo, 1);
-	timer_settime(timer_put, 1);   
+	timer_settime(timer_put, 1);
+	timer_1s = timer_alloc();
+	timer_init(timer_1s, &fifo, 100);
+	timer_settime(timer_1s, 100);
 
 	for (;;) {
 		count++;
@@ -314,6 +317,11 @@ void task_b_main(struct SHEET *sht_back)
 			} else if (i == 2) {
 				farjmp(0, 3 * 8);
 				timer_settime(timer_ts, 2);
+			} else if (i == 100) {
+				sprintf(s, "%11d", count - count0);
+				putfonts8_asc_sht(sht_back, 0, 128, COL8_FFFFFF, COL8_008484, s, 11);
+				count0 = count;
+				timer_settime(timer_1s, 100);
 			}
 		}
 	}