+from microbit import *
+import radio
+
+A_IMAGE = Image('09909:'
+ '90090:'
+ '99990:'
+ '90090:'
+ '90090')
+
+B_IMAGE = Image('99909:'
+ '90090:'
+ '99900:'
+ '90090:'
+ '99900')
+
+display.scroll('Press', wait=False, loop=True)
+last_sent_time = None
+
+while True:
+ if button_a.was_pressed():
+ display_image = A_IMAGE
+ last_sent_time = running_time()
+ radio.on()
+ radio.send('a')
+ radio.off()
+ if button_b.was_pressed():
+ display_image = B_IMAGE
+ last_sent_time = running_time()
+ radio.on()
+ radio.send('b')
+ radio.off()
+ if last_sent_time:
+ dimness = (running_time() - last_sent_time) / 500
+ if dimness > 9: dimness = 9
+ display.show(display_image / dimness, wait=False)
+
\ No newline at end of file