camera { 
    location <-9, .3, -5>
    up y*image_height right x*image_width angle 40 look_at <6, .3, 0>
}
background { rgb 1 }

#declare space = .54;
#declare depth = .003;
union {
    text { ttf "chalkboard.ttf", "0.9" depth, 0 translate -1.47*x }
    #declare n=0;
    #while (n<5000)
        text { ttf "chalkboard.ttf", "9", depth, 0 translate space*n*x }
        #declare n=n+1;
    #end
    box { <space*(n-1), -.025, 0>, <10000000, .665, depth> }
    pigment { color rgb 0 }
}