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diff --git a/dev/a6-harold/sky.cc b/dev/a6-harold/sky.cc
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+/** CSci-4611 Assignment 6: Harold
+ */
+
+#include "sky.h"
+
+
+Sky::Sky() {
+    
+}
+
+
+Sky::~Sky() {
+    
+}
+
+void Sky::Init(ShaderProgram *stroke3d_shaderprog) {
+    stroke3d_shaderprog_ = stroke3d_shaderprog;
+}
+
+
+/// Projects a 2D normalized screen point (e.g., the mouse position in normalized
+/// device coordinates) to a 3D point on the "sky", which is really a huge sphere
+/// (radius = 1500) that the viewer is inside.  This function should always return
+/// true since any screen point can successfully be projected onto the sphere.
+/// sky_point is set to the resulting 3D point.  Note, this function only checks
+/// to see if the ray passing through the screen point intersects the sphere; it
+/// does not check to see if the ray hits the ground or anything else first.
+bool Sky::ScreenPtHitsSky(const Matrix4 &view_matrix, const Matrix4 &proj_matrix,
+                        const Point2 &normalized_screen_pt, Point3 *sky_point)
+{
+    // TODO: Stitch together your worksheet implementation of this method
+    return true;
+}
+
+
+
+
+/// Creates a new sky stroke mesh by projecting each vertex of the 2D mesh
+/// onto the sky dome and saving the result as a new 3D mesh.
+void Sky::AddSkyStroke(const Matrix4 &view_matrix, const Matrix4 &proj_matrix,
+                       const Mesh &stroke2d_mesh, const Color &stroke_color)
+{
+    // TODO: Create a new SkyStroke and add it to the strokes_ array.
+
+
+
+
+
+
+
+
+
+
+}
+
+
+/// Draws all of the sky strokes
+void Sky::Draw(const Matrix4 &view_matrix, const Matrix4 &proj_matrix) {
+
+    // Precompute matrices needed in the shader
+    Matrix4 model_matrix; // identity
+    Matrix4 modelview_matrix = view_matrix * model_matrix;
+    
+    // Draw sky meshes
+    stroke3d_shaderprog_->UseProgram();
+    stroke3d_shaderprog_->SetUniform("modelViewMatrix", modelview_matrix);
+    stroke3d_shaderprog_->SetUniform("projectionMatrix", proj_matrix);
+    for (int i=0; i<strokes_.size(); i++) {
+        stroke3d_shaderprog_->SetUniform("strokeColor", strokes_[i].color);
+        strokes_[i].mesh.Draw();
+    }
+    stroke3d_shaderprog_->StopProgram();
+}
+