diff --git a/.gitignore b/.gitignore
index 80c4fce..734e022 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,3 +1,4 @@
 .direnv/
 target/
 result/
+*.png
diff --git a/Cargo.toml b/Cargo.toml
index 4d9832a..09b20c5 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -22,6 +22,10 @@ path = "src/bin/repl.rs"
 name = "rt_lisp_demo"
 path = "src/bin/rt_lisp_demo.rs"
 
+[[bin]]
+name = "rt_interp"
+path = "src/bin/rt_interp.rs"
+
 [workspace]
 members = [ "lispers-core", "lispers-macro"]
 
diff --git a/scenes/demo-1.lisp b/scenes/demo-1.lisp
new file mode 100644
index 0000000..021914a
--- /dev/null
+++ b/scenes/demo-1.lisp
@@ -0,0 +1,79 @@
+(set 'red
+     (material
+      (color 1 0 0)
+      (color 1 0 0)
+      (color 0.5 0 0)
+      50 0.25))
+(set 'blue
+     (material
+      (color 0 0 1)
+      (color 0 0 1)
+      (color 0 0 0.6)
+      50 0.25))
+(set 'green
+     (material
+      (color 0 1 0)
+      (color 0 1 0)
+      (color 0 0.6 0)
+      50 0.25))
+(set 'white
+     (material
+      (color 1 1 1)
+      (color 1 1 1)
+      (color 0.6 0.6 0.6)
+      100 0.5))
+(set 'black
+     (material
+      (color 0 0 0)
+      (color 0 0 0)
+      (color 0.6 0.6 0.6)
+      100 0.5))
+
+(set 's1
+     (sphere
+      (point 0 1 0) 1 blue))
+(set 's2
+     (sphere
+      (point 2 0.5 2) 0.5 green))
+
+(defun spiral-sphere (i n)
+  (sphere
+   (progn
+     (print "Spiral Sphere at: ")
+     (println (point
+               (* 2 (cos (/ (* i 6.2) n)))
+               0.5
+               (* 2 (sin (/ (* i 6.2) n)))))
+     )
+   0.5 red))
+
+(defun spiral (scn i n)
+  (if (< i n)
+      (scene-add
+       (spiral scn (+ i 1) n)
+       (spiral-sphere i n))
+      scn))
+
+(set 'p1
+     (checkerboard
+      (point 0 0 0)
+      (vector 0 1 0)
+      black white 0.5
+      (vector 0.5 0 1)))
+
+(set 'l1 (light (point 3 10 5) (color 1 1 1)))
+(set 'l2 (light (point 2 10 5) (color 1 1 1)))
+
+
+(set 'scn (scene
+           (color 0.1 0.1 0.1)
+           '(s1 s2 p1)
+           '(l1 l2)))
+
+(set 'scn (spiral scn 0.0 10.0))
+
+(println (cons "Final Scene:" scn))
+
+(set 'cam (camera (point 0 3 6) (point 0 0 0) (vector 0 1 0) 40 1920 1080))
+
+(render cam scn 5 4 "demo-1.png")
diff --git a/src/bin/rt_interp.rs b/src/bin/rt_interp.rs
new file mode 100644
index 0000000..6471bb1
--- /dev/null
+++ b/src/bin/rt_interp.rs
@@ -0,0 +1,38 @@
+use std::env;
+
+use lispers::raytracer::lisp::mk_raytrace;
+use lispers_core::lisp::environment::EnvironmentLayer;
+use lispers_core::lisp::prelude::mk_prelude;
+use lispers_core::lisp::{eval, Environment};
+use lispers_core::parser::ExpressionStream;
+
+fn main() {
+    let program_paths: Vec<_> = env::args().skip(1).collect();
+    let programs: Vec<_> = program_paths
+        .iter()
+        .map(|path| std::fs::read_to_string(path).unwrap())
+        .collect();
+
+    let mut layer = EnvironmentLayer::new();
+    mk_prelude(&mut layer);
+    mk_raytrace(&mut layer);
+
+    let environment = Environment::from_layer(layer);
+
+    for (i, r) in
+        ExpressionStream::from_char_stream(programs.iter().map(|p| p.chars()).flatten()).enumerate()
+    {
+        match r {
+            Err(err) => {
+                println!("ParserError in Expression {}: {:?}", i + 1, err);
+                break;
+            }
+            Ok(expr) => match eval(&environment, expr) {
+                Ok(_) => {}
+                Err(e) => println!("Error evaluating Expression {}: {}", i + 1, e),
+            },
+        }
+    }
+
+    println!("Interpreter Done!");
+}
diff --git a/src/bin/rt_lisp_demo.rs b/src/bin/rt_lisp_demo.rs
index 2513a39..1d5bf1c 100644
--- a/src/bin/rt_lisp_demo.rs
+++ b/src/bin/rt_lisp_demo.rs
@@ -6,20 +6,21 @@ use lispers_core::parser::ExpressionStream;
 
 fn main() {
     let programs = [
-        "(vadd (vector 1 2 3) (vector 4 5 6))",
-        "(vadd (vector 1 2 3) (point 4 5 6))",
-        "(vadd (point 1 2 3) (vector 4 5 6))",
-        "(vadd (point 1 2 3) (point 4 5 6))",
+        "(set 'red (material (color 1 0 0) (color 1 0 0) (color 0.5 0 0) 50 0.25))",
         "(set 'blue (material (color 0 0 1) (color 0 0 1) (color 0 0 0.6) 50 0.25))",
         "(set 'green (material (color 0 1 0) (color 0 1 0) (color 0 0.6 0) 50 0.25))",
         "(set 'white (material (color 1 1 1) (color 1 1 1) (color 0.6 0.6 0.6) 100 0.5))",
         "(set 'black (material (color 0 0 0) (color 0 0 0) (color 0.6 0.6 0.6) 100 0.5))",
         "(set 's1 (sphere (point 0 1 0) 1 blue))",
         "(set 's2 (sphere (point 2 0.5 2) 0.5 green))",
+        "(defun spiral-sphere (i n) (sphere (print (point (* 2 (cos (/ (* i 6.2) n))) 0.5 (* 2 (sin (/ (* i 6.2) n))))) 0.5 red))",
+        "(defun spiral (scn i n) (if (< i n) (scene-add (spiral scn (+ i 1) n) (spiral-sphere i n)) scn))",
         "(set 'p1 (checkerboard (point 0 0 0) (vector 0 1 0) black white 0.5 (vector 0.5 0 1)))",
         "(set 'l1 (light (point 3 10 5) (color 1 1 1)))",
         "(set 'l2 (light (point 2 10 5) (color 1 1 1)))",
         "(set 'scn (scene (color 0.1 0.1 0.1) '(s1 s2 p1) '(l1 l2)))",
+        "(set 'scn (spiral scn 0.0 10.0))",
+        "(print scn)",
         "(set 'cam (camera (point 0 3 6) (point 0 0 0) (vector 0 1 0) 40 1920 1080))",
         "(render cam scn 5 4 \"rt-lisp-demo.png\")",
     ];