diff --git a/README.md b/README.md
new file mode 100644
index 0000000..2dda5a4
--- /dev/null
+++ b/README.md
@@ -0,0 +1 @@
+Based on the article https://raytracing.github.io/books/RayTracingInOneWeekend.html
diff --git a/src/main.zig b/src/main.zig
index 6531f74..1f1d0f7 100644
--- a/src/main.zig
+++ b/src/main.zig
@@ -1,4 +1,5 @@
 const std = @import("std");
+const vec3 = @import("vec3.zig");
 
 pub fn main() anyerror!void {
     const stdout = std.io.getStdOut().writer();
diff --git a/src/ray.zig b/src/ray.zig
new file mode 100644
index 0000000..055b22d
--- /dev/null
+++ b/src/ray.zig
@@ -0,0 +1,6 @@
+const vec3 = @import("vec3.zig");
+
+pub const ray = struct {
+    origin : vec3.point3,
+    dir : vec3.vec3,
+};
diff --git a/src/point.zig b/src/vec3.zig
similarity index 81%
rename from src/point.zig
rename to src/vec3.zig
index 10f8f12..d05b99a 100644
--- a/src/point.zig
+++ b/src/vec3.zig
@@ -1,4 +1,4 @@
-const vec3 = struct {
+pub const vec3 = struct {
     x: f64,
     y: f64,
     z: f64,
@@ -12,4 +12,4 @@ const vec3 = struct {
     }
 };
 
-const color = vec3;
+pub const color = vec3;