import graph3; 
size(7.5cm,0); 

currentprojection=perspective(100,100,150); 
 
draw(extrude("ABC",3Z),green); 

limits(O,15X+10Y+15Z);
xaxis3(Label("$x$",1),blue,arrow=Arrow3);
yaxis3(Label("$y$",1),blue,arrow=Arrow3);
zaxis3(Label("$z$",1),blue,arrow=Arrow3);