sample script but won't behave properly please help

[dgd]

I hope this paste works.
I got it here:
http://www.medphys.ucl.ac.uk/~mbanaji/recreation/logoscripts/leaf.logo

I'm trying to make this work in kturtle.
I've been posting my efforts here:
http://www.youtube.com/profile?user=pleabargain&view=videos&query=kturtle

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# This script creates a leaf
# It is an example of an
# "iterated function system"
# You can find out more at
# http://en.wikipedia.org/wiki/Iterated_function_system

reset
canvassize 500,500
pencolor 1,125,1

$p=1
$q=1

# you can change the number of iterations
# also change the maps if you like
repeat 10{
$p1 = random 0,255
$p2 = random 0,255
$p3 = random 0,30
pencolor $p1,$p2,$p3
$x = random 1,100
$pt = $p
$qt = $q
if $x < 86 {
$p=0.85*$pt+0.04*$qt
$q=-0.04*$pt+0.85*$qt+1.6
}
if ($x >= 86) and ($x < 93) {
$p=-0.15*$pt+0.28*$qt
$q=0.26*$pt+0.24*$qt+0.44
}
if ($x >=93) and ($x < 99) {
$p=0.2*$pt-0.26*$qt
$q=0.23*$pt+0.22*$qt+1.6
}
if ($x >= 99) {
$p=0
$q=0.16*$qt
}
go 50*$p+200, 50*(500-$q)
pendown
forward 1
penup
backward 1
}

go 0,0