hi i'm new at pd, i'm trying to do a external using GEM, but i have no idea how to 
start, i tried to search for any tutorial but i didnt find anyone... <br><br>if anyone can write some simple code for me i&#39;m very thankfull<br><br>what i&#39;m trying to do first of all is something like this:<br><br>
for(int y=0 ; y&lt; GEMwidth; y++)<br>   for(int x=0; x&lt;GEMheight; x++)<br>    {<br>       glColor3f(0, 0, 1);<br>       glBegin(GL_POINTS);<br>       glVertex2i(x,y);<br>       glEnd();<br>   }<br><br>but on render of GEM in pd<br>
<br>a simple tutorial will help me a lot... thx