diff --git a/README.md b/README.md
index b9e2b14..0037362 100644
--- a/README.md
+++ b/README.md
@@ -4,8 +4,15 @@ Interferometer for Finesse 3. Can be used with the
 [finesse-virgo](https://gitlab.com/ifosim/finesse/finesse-virgo)
 package.
 
-Katscript files are organized by priority number (first two number),
-which indicate the file loading order, the lowest at first.
+## Get started
+
+For simple use, `layout` file can be used. A layout is a list of files
+separated by new line to load in order to create a
+[finesse3](https://finesse.ifosim.org) model. The "simple" model
+present some quick model with little components which allows to
+manipulate easily a finesse model.
+The "finesse-virgo" model correspond to the model available in the
+[finesse-virgo package](https://git.ligo.org/ifosim/finesse-virgo).
 
 ## Sections
 
@@ -13,87 +20,45 @@ Katscript files are organized in different types, which are `values`,
 `optical setup`, `link`, `cavities definition`, `degree of freedom`,
 `detectors` and `after variables`.
 
-### values
+### variables
 
-priority number from 00 to 09
+Contains values used in the setup.
 
-Contains values used in the setup
+It can defines variable which depends of components in the setup for
+preprocessing (finesse-virgo package for example) too.
 
-### optical setup
+### components
 
-priority number from 10 to 19
+Defined part of the optical setup (Laser, Mirror, etc.) or set of parts.
 
-Defined part of the optical setup (Laser, Mirror, etc.)
-
-### link
-
-priority number from 20 to 49
+### links
 
 Link together parts of the optical setup defined before
 
 ### cavities
 
-priority number from 50 to 69
-
-Defines Finesse 3 cavity
+Defines Finesse3 cavity
 
 ### degree of freedom
 
-priority number from 70 to 89
-
-Defines Finesse 3 degree of freedom
+Defines Finesse3 degree of freedom
 
 ### detectors
 
-priority number from 70 to 89
-
-Add Finesse 3 readout
-
-### after variables
-
-priority number from 90 to 99
-
-Defines variable which depends of components in the setup for
-preprocessing (finesse-virgo package for example)
+Add Finesse3 detectors
 
 ## Getting started
 
 Code example to build a Virgo model with these scripts.
 
 ```py
+    from pathlib import Path
+
+    layout_file = Path("layout/finesse-virgo/no_benches") # path to layout file
+    with layout_file.open() as f:
+        files = f.read().splitlines() # convert layout file to list of path
     virgo = Virgo(
-        files_to_parse = [
-            "00_variables.kat",
-            "01_arm_north.kat",
-            "01_arm_west.kat",
-            "01_detection.kat",
-            "01_laser_and_modulator.kat",
-            "01_recycling_cavity.kat",
-            "02_B5_path.kat",
-            "05_attenuator.kat",
-            "05_link_length.kat",
-            "05_modulation.kat",
-            "05_tuning.kat",
-            "10_laser_and_modulator.kat",
-            "10_faraday_isolator.kat",
-            "10_recycling_cavity.kat",
-            "10_arm_north.kat",
-            "10_arm_west.kat",
-            "10_detection.kat",
-            "10_B2_attenuator.kat",
-            "10_B4_attenuator.kat",
-            "25_link_laser_and_modulator_faraday_isolator_noSIB1.kat",
-            "20_link_faraday_isolator_recycling_cavity.kat",
-            "25_link_faraday_isolator_B2_attenuator_noSIB2.kat",
-            "20_link_recycling_cavity_arms.kat",
-            "25_link_recycling_cavity_detection_noSDB1.kat",
-            "25_link_recycling_cavity_B4_attenuator_noSPRB.kat",
-            "30_link_arm_north_SNEB.kat",
-            "50_cavities.kat",
-            "70_detectors.kat",
-            "70_degree_of_freedom.kat",
-            "99_after_variables.kat",
-        ],
+        files_to_parse = files, # create model with the given list of path
     )
 ```
 
diff --git a/two_FP b/two_FP
deleted file mode 100644
index 75acdc4..0000000
--- a/two_FP
+++ /dev/null
@@ -1,14 +0,0 @@
-variables/main.kat
-variables/simple/main.kat
-variables/simple/cavities.kat
-components/simple/laser.kat
-components/simple/beamsplitter.kat
-components/simple/cavity_west.kat
-components/simple/cavity_north.kat
-components/simple/detection.kat
-links/simple/laser_beamsplitter.kat
-links/simple/beamsplitter_cavity_west.kat
-links/simple/beamsplitter_cavity_north.kat
-detectors/simple/cavity_west.kat
-detectors/simple/cavity_north.kat
-degree_of_freedom/simple/main.kat