poly numeric array variable
poly {x1, y1, x2, y2, x3, y3 …}
Draws a polygon. The sides of the polygon are defined by the values stored in the array, which should be stored as x,y pairs, sequentially. The length of the array/2 will define the number of points. A polygon may also be specified using an Anonymous Array (list of x,y pairs enclosed in curly braces {}).
The number of points in the array argument was removed from the poly statement in version 0.9.4.
# using an array
color blue
rect 0,0,300,300
color green
dim tri(1)
tri = {100, 100, 200, 200, 100, 200}
poly tri
# using an anonymous array
color blue
rect 0,0,300,300
color green
poly {100, 100, 200, 200, 100, 200}