(problème) Plantage dans mon script de crédit

#Font

CREDITS_FONT = "Monotype Corsiva"
CREDITS_SIZE = 32
CREDITS_OUTLINE = Color.new(0,0,127, 255)
CREDITS_SHADOW = Color.new(0,0,0, 100)
CREDITS_FILL = Color.new(255,255,255, 255)

#==============================================================================
# ¦ Scene_Credits
#------------------------------------------------------------------------------
# This script has been edited from the original RPG Maker XP version.
#------------------------------------------------------------------------------
# It now uses pictures from the pictures folder instead of titles from the
# titles folder.
#------------------------------------------------------------------------------
# This script might need the RMXP to RMVX Compatibility Patch avialble at RPG
# Maker.net
#------------------------------------------------------------------------------
# Edited by Mac Malone (Dr.?)
# XP Version: Oringinal Author unknow, but edidted by MiDas Mike so it doesn't
# play over the Title, but runs by calling the following:
# $scene = Scene_Credits.new
#==============================================================================

class Scene_Credits

# This next piece of code is the credits.
#Start Editing

CREDIT=<<_END_


Tavales, terre de feu et de sang


Créateur du projet
---------------
Emixam2



Scénario
---------------
Kevmess



Mapping
---------------
Emixam2



Musique et bruit
---------------




Scripts
---------------




Remerciement Spéciale
---------------
Un gros merci à Kevmess qui ma fournit la base du scénario
de ce projet.




---------------







_END_

#Stop Editing

def main
#-------------------------------
# Animated Background Setup
#-------------------------------
@sprite = Sprite.new
#@sprite.bitmap = Cache.picture($data_system.title_name)
@backgroundList = ["Dragon"] #Edit this to the picture(s) you wish to show in the background. They do repeat.
@backgroundGameFrameCount = 0
# Number of game frames per background frame.
@backgroundG_BFrameCount = 3.4
@sprite.bitmap = Cache.picture(@backgroundList[0])

#------------------
# Credits Setup
#------------------
credit_lines = CREDIT.split(/\n/)
credit_bitmap = Bitmap.new(640,32 * credit_lines.size)
credit_lines.each_index do |i|
line = credit_lines[i]
credit_bitmap.font.name = CREDITS_FONT
credit_bitmap.font.size = CREDITS_SIZE
x = 0
credit_bitmap.font.color = CREDITS_OUTLINE
credit_bitmap.draw_text(0 + 1,i * 32 + 1,640,32,line,1)
credit_bitmap.draw_text(0 - 1,i * 32 + 1,640,32,line,1)
credit_bitmap.draw_text(0 + 1,i * 32 - 1,640,32,line,1)
credit_bitmap.draw_text(0 - 1,i * 32 - 1,640,32,line,1)
credit_bitmap.font.color = CREDITS_SHADOW
credit_bitmap.draw_text(0,i * 32 + 8,640,32,line,1)
credit_bitmap.font.color = CREDITS_FILL
credit_bitmap.draw_text(0,i * 32,640,32,line,1)
end
@credit_sprite = Sprite.new(Viewport.new(0,50,640,380))
@credit_sprite.bitmap = credit_bitmap
@credit_sprite.z = 9998
@credit_sprite.oy = -430
@frame_index = 0
@last_flag = false

#--------
# Setup
#--------
# ME?BGS ??????
Audio.me_stop
Audio.bgs_stop
Audio.se_stop
# ?????????
Graphics.transition
# ??????
loop do
# ????????
Graphics.update
# ???????
Input.update
# ??????
update
# ????????????????
if $scene != self
break
end
end
# ?????????
Graphics.freeze
@sprite.dispose
@credit_sprite.dispose
end
#Checks if credits bitmap has reached it's ending point
def last?
return (@frame_index >= @credit_sprite.bitmap.height + 480)
end
def last
if not @last_flag
@last_flag = true
@last_count = 0
else
@last_count += 1
end
if @last_count >= 300
$scene = Scene_title.new
end
end
#Check if the credits should be cancelled
def cancel?
if Input.trigger?(Input::C)
$scene = Scene_title.new
return true
end
return false
end

#--------------------------------------------------------------------------
# ? ??????
#--------------------------------------------------------------------------
def update
@backgroundGameFrameCount = @backgroundGameFrameCount + 1
if @backgroundGameFrameCount >= @backgroundG_BFrameCount
@backgroundGameFrameCount = 0
# Add current background frame to the end
@backgroundList = @backgroundList << @backgroundList[0]
# and drop it from the first position
@backgroundList.delete_at(0)
@sprite.bitmap = Cache.picture(@backgroundList[0])
end
return if cancel?
last if last?
@credit_sprite.oy += 1
end
end