diff --git a/parser/parser.lex b/parser/parser.lex
index 8922003..d98b9f3 100644
--- a/parser/parser.lex
+++ b/parser/parser.lex
@@ -29,13 +29,28 @@
 \<                  return LESS;
 \>                  return GREATER;
 
-[0-9]+              return DEC_NUMBER;
-[0-9]*\.[0-9]+      return REAL_NUMBER;
+-?[0-9]+            return DEC_NUMBER;
+-?[0-9]*\.[0-9]+    return REAL_NUMBER;
 
+box                 return BOX;
 camera              return CAMERA;
 color               return COLOR;
+height              return HEIGHT;
+look_at             return LOOKAT;
+material            return MATERIAL;
+multisample         return MULTISAMPLE;
+options             return OPTIONS;
+plane               return PLANE;
 position            return POSITION;
+radius              return RADIUS;
+reflectance         return REFLECTANCE;
 scene               return SCENE;
+shininess           return SHININESS;
+size                return SIZE;
+sphere              return SPHERE;
+up                  return UP;
+vfov                return VFOV;
+width               return WIDTH;
 
 \n                  /* ignore newlines */
 [ \t\v]             /* ignore whitespace */
diff --git a/parser/parser.yy b/parser/parser.yy
index 902fe4f..f00d991 100644
--- a/parser/parser.yy
+++ b/parser/parser.yy
@@ -20,6 +20,8 @@ int yywrap()
     return 1;
 }
 
+#define YYSTYPE void *
+
 %}
 
 %token PLUS;
@@ -49,21 +51,105 @@ int yywrap()
 %token DEC_NUMBER;
 %token REAL_NUMBER;
 
+%token BOX;
 %token CAMERA;
 %token COLOR;
+%token HEIGHT;
+%token LOOKAT;
+%token MATERIAL;
+%token MULTISAMPLE;
+%token OPTIONS;
+%token PLANE;
 %token POSITION;
+%token RADIUS;
+%token REFLECTANCE;
 %token SCENE;
+%token SHININESS;
+%token SIZE;
+%token SPHERE;
+%token UP;
+%token VFOV;
+%token WIDTH;
 
 %%
 
 scene: /* empty */
-       | scene_spec { printf("Saw a number\n"); }
+       | scene_spec { printf("Saw a scene\n"); }
        ;
 
+box: BOX LCURLY box_items RCURLY
+   ;
+
+box_items: shape_items
+         | SIZE vector box_items
+         ;
+
+camera: CAMERA LCURLY camera_items RCURLY
+      ;
+
+camera_items: /* empty */
+            | camera_item camera_items
+            ;
+
+camera_item: POSITION vector
+           | LOOKAT vector
+           | UP vector
+           | VFOV vector
+           ;
+
+material: MATERIAL LCURLY material_items RCURLY
+        ;
+
+material_items: /* empty */
+              | material_item material_items
+              ;
+
+material_item: COLOR vector
+             | REFLECTANCE number
+             | SHININESS number
+             ;
+
 number: DEC_NUMBER
       | REAL_NUMBER
       ;
 
+plane: PLANE LCURLY plane_items RCURLY
+     ;
+
+plane_items: shape_items
+           | POSITION vector COMMA number plane_items
+           ;
+
+scene_spec: SCENE LCURLY scene_items RCURLY
+          ;
+
+scene_items: /* empty */
+           | scene_item scene_items
+           ;
+
+scene_item: camera
+          | shape
+          ;
+
+shape: plane
+     | sphere
+     | box
+     ;
+
+shape_items: /* empty */
+           | material
+           ;
+
+sphere: SPHERE LCURLY sphere_items RCURLY
+      ;
+
+sphere_items: shape_items
+            | RADIUS number sphere_items
+            ;
+
+vector: LESS number COMMA number COMMA number GREATER
+      ;
+
 %%
 
 int parse(const char * fileName)