1 files changed, 23 insertions, 4 deletions
diff --git a/src/Mind.hs b/src/Mind.hs
index 02b98b1..45b90da 100644
--- a/src/Mind.hs
+++ b/src/Mind.hs
@@ -1,11 +1,30 @@
 module Mind
   ( NeuronIndex (..)
   , getNeuronIndex
+
+  , Edge (..)
+  
+  , Network (..)
+  , createEmptyNetwork
   ) where
 
--- types
-data NeuronIndex = Input Int | Internal Int | Output Int
+-- index different neuron types
+data NeuronIndex = Input Int | Internal Int | Output Int deriving (Show, Eq)
+
 getNeuronIndex :: NeuronIndex -> Int
-getNeuronIndex i = undefined
+getNeuronIndex (Input i)    = i
+getNeuronIndex (Internal i) = i
+getNeuronIndex (Output i)   = i
+
+-- define incident edges
+newtype Edge = Edge (NeuronIndex, Float) deriving (Show, Eq)
+
+-- define networks
+data Network = Network 
+  { numInput :: Int
+  , internalNeurons :: [[Edge]]
+  , outputNeurons :: [[Edge]]
+  } deriving (Show, Eq)
 
-newtype Edge = Edge (NeuronIndex, Float)
+createEmptyNetwork :: Int -> Int -> Int -> Network
+createEmptyNetwork i h o = Network i (replicate h []) (replicate o [])