diff --git a/compile b/compile
index d99205d..07b329e 100644
--- a/compile
+++ b/compile
@@ -4,11 +4,13 @@ CC=clang
 CFLAGS="-g -Wall -Werror -pedantic -Iinclude $(pkg-config --cflags sdl2)"
 LIBS="$(pkg-config --libs sdl2)"
 
-SRC="src/*.c"
+RAYTRACER_SRC="src/window/*.c \
+	src/raytracer/*.c \
+"
 
 BUILD=build_dir
-OUT="$BUILD/main"
+RAYTRACER_OUT="$BUILD/raytracer"
 
 mkdir -p $BUILD
 
-(set -x ; $CC $CFLAGS $LIBS $SRC -o $OUT)
+(set -x ; $CC $CFLAGS $LIBS $RAYTRACER_SRC -o $RAYTRACER_OUT)
diff --git a/run b/run
index 4485a73..b9b89d0 100644
--- a/run
+++ b/run
@@ -1,3 +1,23 @@
 #!/bin/bash
 
-./build_dir/main
+USAGE="Usage: run (raytracer | rasteriser)"
+
+if [[ $# == 0 ]]; then
+	echo $USAGE
+	exit 1
+fi
+
+while [[ $# -gt 0 ]]; do
+  case $1 in
+    raytracer)
+      RENDERER="raytracer"
+      shift # past argument
+      ;;
+    -*|--*|*)
+			echo $USAGE
+      exit 1
+      ;;
+  esac
+done
+
+./build_dir/$RENDERER