do a single green pulse when starting

libs/ev3/startup.ts

@@ -1,9 +1,8 @@
 // This is the last thing executed before user code
 
-// We pause for 100ms to give time to read sensor values, so they work in on_start block
-pause(100)
-
 // pulse green, play startup sound, turn off light
 brick.setStatusLight(StatusLight.GreenPulse);
-music.playSoundEffectUntilDone(sounds.systemStartUp);
+// We pause for 100ms to give time to read sensor values, so they work in on_start block
+pause(400)
+// and we're ready
 brick.setStatusLight(StatusLight.Off);