improved the figure

Author: simongravelle

docs/sphinx/source/tutorials/figures/level1/breaking-a-carbon-nanotube/length-unbreakable-dark.png

@@ -130,7 +130,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 5,
+   "execution_count": 4,
    "id": "7c651210",
    "metadata": {},
    "outputs": [
@@ -150,7 +150,7 @@
     "dark_mode = False\n",
     "myplt = PltTools()\n",
     "myplt.prepare_figure(fig_size = (12,8), dark_mode = dark_mode,\n",
-    "                    transparency = True, use_serif=False, n_line=2)\n",
+    "                    transparency = False, use_serif=False, n_line=2)\n",
     "myplt.add_panel()\n",
     "myplt.add_plot(x = Time_EM[::4], y = PotEng_EM[::4], type = \"plot\", linewidth_data = 3,\n",
     "                marker = \"o\", data_color = 1, markersize = 12,\n",
@@ -194,7 +194,7 @@
    "name": "python",
    "nbconvert_exporter": "python",
    "pygments_lexer": "ipython3",
-   "version": "3.0.0"
+   "version": "3.12.3"
   },
   "vscode": {
    "interpreter": {

docs/sphinx/source/tutorials/figures/level1/breaking-a-carbon-nanotube/length-unbreakable-dm.png

@@ -631,13 +631,13 @@ Data extraction
     The length :math:`L` of the CNT increase linearly over
     time for :math:`t > 5\,\text{ps}`, as expected from the imposed constant velocity.
 
-.. figure:: ../figures/level1/breaking-a-carbon-nanotube/length-unbreakable-dark.png
+.. figure:: ../figures/level1/breaking-a-carbon-nanotube/length-unbreakable.png
     :alt: length of the CNT with time - lammps molecular dynamics
-    :class: only-dark
+    :class: only-light
 
-.. figure:: ../figures/level1/breaking-a-carbon-nanotube/length-unbreakable-light.png
+.. figure:: ../figures/level1/breaking-a-carbon-nanotube/length-unbreakable-dm.png
     :alt: length of the CNT with time - lammps molecular dynamics
-    :class: only-light
+    :class: only-dark
 
 ..  container:: figurelegend