diff --git a/embedded-workshop-book/src/time.md b/embedded-workshop-book/src/time.md
index 1ab1c2c..2396fc9 100644
--- a/embedded-workshop-book/src/time.md
+++ b/embedded-workshop-book/src/time.md
@@ -10,4 +10,4 @@ This program will blink (turn on and off) one of the LEDs on the board. The time
 
 The other time related API exposed by the `dk` HAL is the `dk::uptime` function. This function returns the time that has elapsed since the call to the `dk::init` function. This function is used in the program to log the time of each LED toggle operation.
 
-[❗️assignment to chnge something]
\ No newline at end of file
+✅ Try changing the `Duration` value passed to `Timer.wait`. Try values larger than one second and smaller than one second. What values of `Duration` make the blinking imperceptible?