[Jprogramming] A "real" square

['lindaalvord' via Programming]

What is the best way to find the siZe of my screen?Then I want to place a nore 
perfect square in the center of the screen .  Here's the square::load 'plot'  
plot i.7    I want the width to be half the size of my screen.  Have 
fun.Linda,Sent from my Verizon, Samsung Galaxy smartphone
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