Demande d'aide sur un script de changement de polices à volonté

#==============================================================================
# ** Main
#------------------------------------------------------------------------------
# After defining each class, actual processing begins here.
#==============================================================================

begin
if Font.exist?("nom_de_votre_police")
Font.default_name = "Cyclo"
else
Font.default_name = "Verdana"
end
Font.default_name = "Cyclo"
Font.default_size = 24
Font.default_bold = false
Font.default_italic = false
Font.default_shadow = true
if Font.exist?("nom_de_votre_police")
Font.default_name = "nom_de_votre_police"
else
Font.default_name = "Verdana"
end
$showm = Win32API.new 'user32', 'keybd_event', %w(l l l l), ''
$showm.call(18,0,0,0)
$showm.call(13,0,0,0)
$showm.call(13,0,2,0)
$showm.call(18,0,2,0)
Graphics.freeze
$scene = Scene_Title.new
$scene.main while $scene != nil
Graphics.transition(30)
rescue Errno::ENOENT
filename = $!.message.sub("No such file or directory - ", "")
print("Unable to find file #{filename}.")
end