X-Git-Url: http://challenge-bot.com/repos/?a=blobdiff_plain;f=README.md;h=1e14e5225290e5aac144141b254412aa29a401d0;hb=cfa8e9128ec2a939a4f69294f3ca0c57b1b10852;hp=ba08dc04fbabbb346573fc18e9c7042a30f0729b;hpb=df9c03dc6eac3d134b7978fe4002aa615466d772;p=challenge-bot

diff --git a/README.md b/README.md
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--- a/README.md
+++ b/README.md
@@ -1,12 +1,22 @@
 # challenge-bot
 
+## prerequisites
+
+install the following software:
+
+[openSCAD](http://www.openscad.org/downloads)
+
+[fritzing](http://fritzing.org/download/)
+
+[arduino ide](http://arduino.cc/en/Main/Software)
+
 ## quickstart
 
-[openSCAD tutorial](http://xib.me/s2ry)
+[openSCAD tutorial](http://goo.gl/E3OQXc)
 
-[assemble the hardware](http://xib.me/s378)
+[assemble the hardware](http://goo.gl/EV0FCJ)
 
-[wire and load code to the robot](http://xib.me/s379)
+[wire and load code to the robot](http://goo.gl/srWpeI)
 
 ## Introduction