diff --git a/README.md b/README.md
index 9da5942..a71a606 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ C code for videos on YouTube Channel https://www.youtube.com/c/NilsBerglund
 
 Parameter values used in specific simulations will be gradually added to file `Parameters.md`, `Parameters_June21.md` and so on.
 
-There are four groups of 6 files, 17 files, 4 files and 4 files. 
+There are four groups of 6 files, 17 files, 5 files and 4 files. 
 In addition the following files handling color schemes have been included:
 
 1. `hsluv.c`and `hsluv.h` from https://github.com/adammaj1/hsluv-color-gradient 
@@ -93,6 +93,8 @@ in the shell before running the program
 2. *global_ljones.c*:     global variables and parameters
 3. *sub_lj.c*:            drawing and initialization routines
 4. *sub_hashgrid.c*:      hashgrid manipulation routines
+5. *lj_movie.c*:          render movie with precomputed particle positions 
+                          (requires files lj_time_series.dat and lj_final_positions.dat generated by lennardjones)
 
 - Create subfolder `tif_ljones`
 - Customize constants at beginning of .c file