global ux#,uy#,basex#,basey#,g#

...
создадим камеру, обьект blabla и тд
...

g = -10.0

function x(time#)
return time * ux + basex
end function

function y(time#)
return time * uy + basey + (g * time * time) / 2
end function

while not keyhit(1)
time# = float(millisecs()) / 1000.0

pos_x# = x(time)
pos_y# = y(time)

positionentity blabla,x,y,0

renderworld
flip

wend