C program to draw lines with different colors and co-ordinates

#include<graphics.h> 
#include<conio.h> 
#include<stdlib.h> 
#include<dos.h> 
void main() 
{ 
int gm, gd=DETECT; 
int x1,x2,y1,y2,c,I; 
initgraph(&gd,&gm,””); 
while(kbhit()) /* until pressing any key this loop continues */ 
{ 
/* to draw rectangle co-ordinates are taken randomly */ 
x1=rand()%getmaxx(); 
x2=rand()%getmaxx(); 
y1=rand()%getmaxy(); 
y2=rand()%getmaxy(); 
setcolor(rand ()%16); /*to set the line color */ 
line(x1,y1,x2,y2); /* to draw the line */ 
delay(200); /* draw the pixels slowly */ 
} 
getch(); 
closegraph(); /*closes the graph mode */ 
}