diff --git a/Makefile b/Makefile
index 6d02aae..1191753 100644
--- a/Makefile
+++ b/Makefile
@@ -1,3 +1,5 @@
+# Makefile with support for Windows (mingw32) and NIX (clang / gcc).
+
 CC = gcc
 
 NAME = tinn
@@ -7,6 +9,7 @@ SRCS += test.c
 SRCS += Tinn.c
 
 # CompSpec defined in windows environment.
+
 ifdef ComSpec
 	BIN = $(NAME).exe
 else
@@ -32,10 +35,12 @@ else
 endif
 
 # Link.
+
 $(BIN): $(SRCS:.c=.o)
 	$(CC) $(CFLAGS) $(SRCS:.c=.o) $(LDFLAGS) -o $(BIN)
 
 # Compile.
+
 %.o : %.c Makefile
 	$(CC) $(CFLAGS) -MMD -MP -MT $@ -MF $*.td -c $<
 	$(RM) $*.d
diff --git a/README.md b/README.md
index 24a5beb..b514b58 100644
--- a/README.md
+++ b/README.md
@@ -23,6 +23,10 @@ Tinn (Tiny Neural Network) is a dependency free ANSI-C neural network library.
         return 0;
     }
 
-Run the sample:
+For a demo, get some data:
+
+    wget http://archive.ics.uci.edu/ml/machine-learning-databases/semeion/semeion.data
+
+And then build and run the test sample:
 
     make; ./tinn