first commit

playground/src/main.rs

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+fn main() {
+    println!("Hello World");
+}

playground/src/shaders/fragment_shader.glsl

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+#version 140
+
+in vec3 vertex_color;
+out vec4 color;
+
+void main() {
+    color = vec4(vertex_color, 1.0);
+}

playground/src/shaders/vertex_shader.glsl

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+#version 140
+        
+in vec2 position;
+in vec3 color;
+out vec3 vertex_color;
+
+uniform mat4 matrix;
+
+void main() {
+    vertex_color = color; 
+    gl_Position = matrix * vec4(position, 0.0, 1.0);
+}