OpenGL

#include "gl\glut.h"
#include "Windows.h"
#include "stdlib.h"

void display(void)
{    
	int i,arr[625],randx;
	float x,y;
	glClearColor(0.0,0.0,0.0,0.0);
	glClear(GL_COLOR_BUFFER_BIT);
	glPointSize(10);
	for(i=0;i<625;i++)
	{
		arr[i]=i;
	}

	srand(1);

	for (i=625;i>0;i--)
	{
		randx=rand()%i;
		x=arr[randx]%25*0.04;
		y=arr[randx]/25*0.04;
		arr[randx]=arr[i-1];
		glBegin(GL_POINTS);
		glColor3f(0.0,y,x);
		glVertex3f(y,x,0.0);
		glEnd();
		Sleep(2);
		glFlush();
	}
}

int main(int argc,char *argv[])
{
	glutInit(&argc,argv);
	glutInitDisplayMode(GLUT_RGB|GLUT_SINGLE);
	glutInitWindowSize(500,500);
	glutInitWindowPosition(100,100);
	glutCreateWindow("hi~");
	glutDisplayFunc(display);
	glutMainLoop();
	return 0;
}