#include <GL/glut.h>

void display(void) {

  glClearColor(0, 1, 0, 0);
  glClear(GL_COLOR_BUFFER_BIT);

  glFlush();
}

// Setup the rendering state
void SetupRC(void) {
  // Set clear color to blue
  glClearColor(0.0f, 0.0f, 1.0f, 1.0f);
}

int main(int argc, char **argv) {
  glutInit(&argc, argv);
  glutInitDisplayMode(GLUT_SINGLE | GLUT_RGB);
  glutInitWindowSize(500, 500);
  glutCreateWindow("GLUT: Simple");

  glutDisplayFunc(display);

  glutMainLoop();

  return 0;
}