diff --git a/electrode_check.py b/electrode_check.py
index 56360f6..cd9c436 100644
--- a/electrode_check.py
+++ b/electrode_check.py
@@ -302,6 +302,7 @@ def main():
     LED_status[0] = True
     while GPIO.input(Button1_pin) == GPIO.LOW:
         sleep(.1)
+    sleep(2)
     GPIO.output(LED1_pin, GPIO.LOW)
     LED_status[0] = False
 
@@ -320,7 +321,7 @@ def main():
     init_fig = True
 
     try:
-        while GPIO.input(Button1_pin) == GPIO.HIGH:
+        while GPIO.input(Button1_pin) == GPIO.LOW:
             # blinking LED
             if time() - LED_t < .1 and LED_status[0] == False:
                 LED_status[0] = True