fixed vertex array creation;

bite.c

···
 
     glEnableVertexAttribArray(0);
     glEnableVertexAttribArray(1);
-    glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 6*sizeof(float), (void*)0);
-    glVertexAttribPointer(0, 4, GL_FLOAT, GL_FALSE, 6*sizeof(float), (void*)(2 * sizeof(float)));
+    glVertexAttribPointer(0, 2, GL_FLOAT, GL_FALSE, 5*sizeof(float), (void*)0);
+    glVertexAttribPointer(1, 4, GL_FLOAT, GL_FALSE, 5*sizeof(float), (void*)(2 * sizeof(float)));
     glBindBuffer(GL_ARRAY_BUFFER, 0);
     glBindVertexArray(0);