+#include "pico/cyw43_arch.h"
+#include "pico/stdlib.h"
+
+#include "blink.h"
+
+void one_blink(int duration) {
+ cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, 1);
+ sleep_ms(duration);
+ cyw43_arch_gpio_put(CYW43_WL_GPIO_LED_PIN, 0);
+ sleep_ms(duration);
+}
+
+void signal(int count, int duration) {
+ for (int i = 0; i < count; i++)
+ one_blink(duration);
+ sleep_ms(1000);
+}
+
+void blink_forever(int duration) {
+ while (true) {
+ one_blink(duration);
+ }
+}
+
+void signal_error_by_blinking() { blink_forever(100); }
+void signal_success_by_blinking() { blink_forever(400); }