diff --git a/2015/endoh4/README.md b/2015/endoh4/README.md
index f40d85466..00941d19a 100644
--- a/2015/endoh4/README.md
+++ b/2015/endoh4/README.md
@@ -5,6 +5,10 @@ make
 ```
 
 
+There is an alt version which is the originally submitted entry. See [Alternate
+code](#alternate-code) below for details.
+
+
 ## To use:
 
 ```sh
@@ -15,29 +19,27 @@ make
 ### Try:
 
 ```sh
-./prog @ @ @ @ @ @
-
-./prog @ @ @ @ @ @ @ @ @ @ @ @
-
-./prog $(perl -e 'print "@ " x (2*3*5*7);')
-
-./prog $(< Makefile)
+./try.sh
 ```
 
 
 ## Alternate code:
 
-An alternate version of this entry, `prog.alt.c`, is provided.\
+An alternate version of this entry, [prog.alt.c](prog.alt.c), is provided.
 This alternate code does not contain improvements suggested by [Gil
-Dogon](/winners.html#Gil_Dogon); it is
-the author's original entry.
+Dogon](/winners.html#Gil_Dogon); it is the author's original entry.
+
+
+### Alternate build:
 
-To compile this alternate version:
 
 ```sh
 make alt
 ```
 
+
+### Alternate use:
+
 Use `prog.alt` as you would `prog` above.
 
 
@@ -67,7 +69,7 @@ gcc -o prog prog.c
 Inspired by [Animated Factorization
 Diagrams](http://www.datapointed.net/visualizations/math/factorization/animated-diagrams/).
 
-`prog.alt.c` is the original version that I submitted. [Gil
+[prog.alt.c](prog.alt.c) is the original version that I submitted. [Gil
 Dogon](/winners.html#Gil_Dogon) kindly improved it during the review.  Thank
 you!
 
diff --git a/2015/endoh4/try.sh b/2015/endoh4/try.sh
new file mode 100755
index 000000000..c06358f07
--- /dev/null
+++ b/2015/endoh4/try.sh
@@ -0,0 +1,58 @@
+#!/usr/bin/env bash
+#
+# try.sh - demonstrate IOCCC winner 2015/endoh4
+#
+
+# make sure CC is set so that when we do make CC="$CC" it isn't empty. Doing it
+# this way allows us to have the user specify a different compiler in an easy
+# way.
+if [[ -z "$CC" ]]; then
+    CC="cc"
+fi
+
+make CC="$CC" all >/dev/null || exit 1
+
+# clear screen after compilation so that only the entry is shown
+clear
+
+PERL="$(type -P perl)"
+
+echo "$ ./prog @" 1>&2
+./prog @
+
+echo "$ ./prog @ @" 1>&2
+./prog @ @
+
+echo "$ ./prog @ @ @" 1>&2
+./prog @ @ @
+
+echo "$ ./prog @ @ @ @ @" 1>&2
+./prog @ @ @ @ @
+
+echo "$ ./prog @ @ @ @ @ @" 1>&2
+./prog @ @ @ @ @ @
+
+echo "$ ./prog @ @ @ @ @ @ @" 1>&2
+./prog @ @ @ @ @ @ @
+
+echo "$ ./prog @ @ @ @ @ @ @ @" 1>&2
+./prog @ @ @ @ @ @ @ @
+
+echo "$ ./prog @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @" 1>&2
+./prog @ @ @ @ @ @ @ @ @ @ @ @ @ @ @ @
+
+echo "$ ./prog @ @ @ @ @ @ @ @ @ @ @ @" 1>&2
+./prog @ @ @ @ @ @ @ @ @ @ @ @
+
+echo "$ ./prog \"\$(< Makefile)\"" 1>&2
+read -r -n 1 -p "Press any key to continue: "
+echo 1>&2
+./prog "$(< Makefile)"
+
+if [[ -n "$PERL" ]]; then
+    echo "$ ./prog \$($PERL -e 'print "@ " x (2*3*5*7);')" 1>&2
+    read -r -n 1 -p "Press any key to continue: "
+    echo 1>&2
+    ./prog "$($PERL -e 'print "@ " x (2*3*5*7);')"
+fi
+
diff --git a/thanks-for-help.md b/thanks-for-help.md
index 4b84dca2a..021f8176c 100644
--- a/thanks-for-help.md
+++ b/thanks-for-help.md
@@ -3825,6 +3825,11 @@ simply typing `make back_to` or `make mullender`) and then runs the famous
 [1984/mullender.c](/1984/mullender/mullender.c).
 
 
+## [2015/endoh4](2015/endoh4/prog.c) ([README.md](2015/endoh4/README.md]))
+
+[Cody](#cody) added the [try.sh](2015/endoh4/try.sh) script.
+
+
 ## [2015/hou](2015/hou/prog.c) ([README.md](2015/hou/README.md))
 
 [Cody](#cody) added explicit linking of libm (`-lm`) for systems that do not do this