diff --git a/README b/README
index 6daa66c..60f457c 100644
--- a/README
+++ b/README
@@ -32,6 +32,8 @@ gitundo - undo commit.
 
 histogram - make and display a histogram on the command line.
 
+memtestiso - ISO-file for Memtest86+.
+
 mirrorpdf - mirror PDF-file horizontally.
 
 neno - no error no output. Only print STDERR and STDOUT if the command fails.
diff --git a/memtestiso/Makefile b/memtestiso/Makefile
new file mode 100644
index 0000000..99220c7
--- /dev/null
+++ b/memtestiso/Makefile
@@ -0,0 +1,2 @@
+all:
+	sudo ./build.sh
diff --git a/memtestiso/README b/memtestiso/README
new file mode 100644
index 0000000..50644e6
--- /dev/null
+++ b/memtestiso/README
@@ -0,0 +1,13 @@
+= ISO file for Memtest86+ V5.31b =
+
+I could not get the ISO-files on http://www.memtest.org/#downiso to
+work, so I built this based on
+https://superuser.com/questions/727959/how-to-create-a-bootable-memtest86-on-usb-flash-drive
+
+Write as:
+
+    zcat memtest-iso.img.gz > /dev/sdX
+    sync
+
+Set boot method in BIOS as Legacy boot.
+
diff --git a/memtestiso/build.sh b/memtestiso/build.sh
new file mode 100755
index 0000000..35a81e5
--- /dev/null
+++ b/memtestiso/build.sh
@@ -0,0 +1,36 @@
+#!/bin/bash
+
+MEM=5.31b
+SYS=6.03
+MEMTESTB=http://www.memtest.org/download/${MEM}/memtest86+-${MEM}.bin.gz
+SYSLINUX=https://www.kernel.org/pub/linux/utils/boot/syslinux/syslinux-${SYS}.tar.xz
+
+dd if=/dev/zero of=/tmp/loopbackfile.img bs=10M count=1
+loopdev=$(losetup --show -fP /tmp/loopbackfile.img)
+parted -s "$loopdev" mklabel msdos mkpart primary fat16 2048s 5mib set 1 boot on
+fdisk -l $loopdev
+mkfs.vfat -nMEMTEST "$loopdev"p1
+mkdir -p /mnt/memtest
+mount "$loopdev"p1 /mnt/memtest
+
+(
+    cd /tmp
+    wget -m ${MEMTESTB}
+    zcat /tmp/www.memtest.org/download/"$MEM"/memtest86+-"$MEM".bin.gz > /mnt/memtest/memtest
+    cat >/mnt/memtest/syslinux.cfg <<'!'
+PROMPT 0
+TIMEOUT 0
+DEFAULT memtest
+LABEL memtest
+  kernel memtest
+!
+
+    wget -m ${SYSLINUX}
+    cat www.kernel.org/pub/linux/utils/boot/syslinux/syslinux-"$SYS".tar.xz |
+	tar -xJpf -
+    dd bs=440 if=syslinux-${SYS}/bios/mbr/mbr.bin of="$loopdev"
+    syslinux-${SYS}/bios/linux/syslinux -i -s "$loopdev"p1
+)
+umount /mnt/memtest
+losetup -d "$loopdev"
+perl -0777 -pe 's/\0+$//' /tmp/loopbackfile.img  >memtest-iso.img
diff --git a/memtestiso/memtest-iso.img.gz b/memtestiso/memtest-iso.img.gz
new file mode 100644
index 0000000..ea16e19
Binary files /dev/null and b/memtestiso/memtest-iso.img.gz differ
diff --git a/teetime/teetime b/teetime/teetime
index 2f95a5e..297566c 100755
--- a/teetime/teetime
+++ b/teetime/teetime
@@ -44,8 +44,8 @@ Instead of overwriting I<file>, append to I<file>.
 
 =head1 EXAMPLES
 
-  (sleep 0.5; echo After 0.5s; sleep 1.5) | teetime myfile
-  (sleep 0.5; echo After 2.5s; sleep 1.5) | teetime -a myfile
+  (sleep 0.5; echo After 0.5s; sleep 1.5; echo After 2s) | teetime myfile
+  (sleep 0.5; echo After 2.5s; sleep 1.5; echo After 4s) | teetime -a myfile
   teetime -i myfile
 
 =head1 AUTHOR