Implemented textures

assets/shaders/shader.frag

@@ -1,8 +1,24 @@
 #version 150 core
 
-in vec3 _color;
-out vec4 color;
+uniform sampler2D tex;
+uniform float time;
+
+in vec3 color;
+in vec2 coord;
+
+out vec4 outColor;
 
 void main() {
-    color = vec4(_color, 1.0);
+    vec2 sampleCoord;
+
+    if(coord.y < 0.75) {
+        sampleCoord = coord;
+    } else {
+        sampleCoord = vec2(
+            coord.x + 0.025 * sin(time * 1.5 + coord.y * 80.0),
+            (1.0 - coord.y) * 3
+        );
+    }
+
+    outColor = texture(tex, sampleCoord) * vec4(color, 1.0);
 }