diff --git a/src/activities/simplepaint/simplepaint.js b/src/activities/simplepaint/simplepaint.js
index ca29adb53..b26e5a2c0 100644
--- a/src/activities/simplepaint/simplepaint.js
+++ b/src/activities/simplepaint/simplepaint.js
@@ -1,176 +1,176 @@
 /* GCompris - simplepaint.js
  *
  * Copyright (C) 2014 Bruno Coudoin
  *
  * Authors:
  *   Christof Petig and Ingo Konrad (GTK+ version)
  *   Bruno Coudoin <bruno.coudoin@gcompris.net> (Qt Quick port)
  *
  *   This program is free software; you can redistribute it and/or modify
  *   it under the terms of the GNU General Public License as published by
  *   the Free Software Foundation; either version 3 of the License, or
  *   (at your option) any later version.
  *
  *   This program is distributed in the hope that it will be useful,
  *   but WITHOUT ANY WARRANTY; without even the implied warranty of
  *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  *   GNU General Public License for more details.
  *
  *   You should have received a copy of the GNU General Public License
  *   along with this program; if not, see <https://www.gnu.org/licenses/>.
  */
 .pragma library
 .import QtQuick 2.6 as Quick
 
 var url = "qrc:/gcompris/src/activities/simplepaint/resource/"
 
 var colorsSimple = [
             '#00FFFFFF',
             '#FF550000',
             '#FFaa0000',
             '#FFffaaaa',
             '#FFffdd55',
             '#FF918a6f',
             '#FFccff00',
             '#FFe5ff80',
             '#FF330080',
             '#FF9955ff',
             '#FFe9afdd',
             '#FFff2a7f'
 ]
 
 var colorsAdvanced = [
             '#00FFFFFF',
             '#FF550000',
             '#FF800000',
             '#FFaa0000',
             '#FFd40000',
             '#FFff0000',
             '#FFff2a2a',
             '#FFff8080',
             '#FFffaaaa',
             '#FFffd5d5',
             '#FFc83737',
             '#FFd35f5f',
             '#FFde8787',
             '#FFaa4400',
             '#FFd45500',
             '#FFff7f2a',
             '#FFff9955',
             '#FFffccaa',
             '#FFaa8800',
             '#FFffcc00',
             '#FFffdd55',
             '#FFffe680',
             '#FFc8ab37',
             '#FFd3bc5f',
             '#FF918a6f',
             '#FFaca793',
             '#FFaad400',
             '#FFccff00',
             '#FFe5ff80',
             '#FFf6ffd5',
             '#FF00d455',
             '#FF80ffb3',
             '#FF00ffcc',
             '#FF80ffe6',
             '#FF2ad4ff',
             '#FFaaeeff',
             '#FF0066ff',
             '#FF5555ff',
             '#FF87aade',
             '#FF80b3ff',
             '#FF0000ff',
             '#FF330080',
             '#FF9955ff',
             '#FFdd55ff',
             '#FFff2ad4',
             '#FFe9afdd',
             '#FFff2a7f',
             '#FFff80b2',
             '#FFd35f8d'
 ]
 
 var backgrounds = [
     'qrc:/gcompris/src/activities/menu/resource/background.svg',
     'qrc:/gcompris/src/activities/colors/resource/background.svg',
     'qrc:/gcompris/src/activities/wordsgame/resource/background.svg',
     'qrc:/gcompris/src/activities/sudoku/resource/background.svg',
     'qrc:/gcompris/src/activities/mosaic/resource/background.svg',
     'qrc:/gcompris/src/activities/algebra_by/resource/background.svg',
     'qrc:/gcompris/src/activities/scalesboard/resource/background.svg',
     'qrc:/gcompris/src/activities/redraw/resource/background.svg',
     'qrc:/gcompris/src/activities/color_mix/resource/background.svg',
     'qrc:/gcompris/src/activities/missing-letter/resource/background.svg',
     'qrc:/gcompris/src/activities/enumerate/resource/background.svg',
     'qrc:/gcompris/src/activities/football/resource/background.svg',
     'qrc:/gcompris/src/activities/hanoi_real/resource/background.svg',
-    'qrc:/gcompris/src/activities/intro_gravity/resource/background.svg',
+    'qrc:/gcompris/src/activities/gravity/resource/background.svg',
     'qrc:/gcompris/src/activities/instruments/resource/background.svg',
     'qrc:/gcompris/src/activities/gletters/resource/background.svg',
     'qrc:/gcompris/src/activities/braille_alphabets/resource/background.svg',
     'qrc:/gcompris/src/activities/followline/resource/background.svg',
     'qrc:/gcompris/src/activities/money/resource/background.svg',
     'qrc:/gcompris/src/activities/menu/resource/background.svg',
     'qrc:/gcompris/src/activities/smallnumbers2/resource/background.svg',
     'qrc:/gcompris/src/activities/align4-2players/resource/background.svg',
     'qrc:/gcompris/src/activities/smallnumbers/resource/background.svg',
     'qrc:/gcompris/src/activities/magic-hat-minus/resource/background.svg',
     'qrc:/gcompris/src/activities/tic_tac_toe/resource/background.svg',
     'qrc:/gcompris/src/activities/click_on_letter/resource/background.svg',
     'qrc:/gcompris/src/activities/fifteen/resource/background.svg'
 ]
 
 var main
 var items
 
 // The size of the array
 var nbx
 var nby
 
 var currentLevel = 0
 var numberOfLevel = backgrounds.length
 
 function start(main_, items_) {
     main = main_
     items = items_
     currentLevel = 0
     initLevel()
 }
 
 function stop() {
 }
 
 function initLevel() {
     items.bar.level = currentLevel + 1
     items.paintModel.clear()
     nbx = 20 + currentLevel
     nby = Math.floor(nbx * (main.height / main.width))
 
     var model = []
     for(var ix = 0;  ix < nbx; ++ix) {
         for(var iy = 0;  iy < nby; ++iy) {
             items.paintModel.append( {
                "m_ix": ix, "m_iy": iy, "m_nbx": nbx, "m_nby": nby,
             } )
         }
     }
 }
 
 function nextLevel() {
     if(numberOfLevel <= ++currentLevel ) {
         currentLevel = 0
     }
     initLevel();
 }
 
 function previousLevel() {
     if(--currentLevel < 0) {
         currentLevel = numberOfLevel - 1
     }
     initLevel();
 }
 
 function getColor() {
     return items.colorSelector
 }