Update README.md (#28)

README.md

@@ -1,2 +1,30 @@
 Swolemak
 ========
+
+## Flash instructions (Windows)
+
+* Download QMK-toolbox, found [here](https://github.com/qmk/qmk_toolbox/releases).
+* Download the .hex file under the `Code`-tab, then you find it under releases.
+* Make sure that the reciever is discovered, if successful a message will appear. 
+```
+*** Unknown: Mitosis connected  -- FEED:0000:0000
+```
+* Load the .hex file that you downloaded with the "Local file"-field.
+* Reset the reciever by pressing the button closest to the micro USB connector.
+* Now a yellow line should be printed.
+```
+*** Caterina device connected: Arduino Micro bootloader (COM3) -- 0000:0000:0000
+```
+* Quickly press flash, you only have a couple of seconds!
+* A message like this should now appear.
+```
+*** Attempting to flash, please don't remove device
+```
+* If successful, you will see this print out.
+```
+    avrdude.exe: verifying ...
+    avrdude.exe: 22904 bytes of flash verified
+    
+    avrdude.exe done.  Thank you.
+```
+You are now __DONE__, congratulations!