X-Git-Url: http://challenge-bot.com/repos/?p=challenge-bot;a=blobdiff_plain;f=README.md;fp=README.md;h=ffbbda5b0efb44a03cb76a0028de009edc85eed5;hp=ba08dc04fbabbb346573fc18e9c7042a30f0729b;hb=ef4da8bd93f3dcc1feb353a89c65b8ed77b83cd3;hpb=38be9fc9c5967e0471965dec1e562d3fd37f4b8b

diff --git a/README.md b/README.md
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--- a/README.md
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 # 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)