Add a demo gif using VHS

README.md

@@ -12,3 +12,5 @@ $ opam build
 ```
 
 I hope these plugins help beginners have a more straighforward experience with OCaml.
+
+<img src="https://github.com/kit-ty-kate/opam-build/raw/main/demo/demo.gif"/>

demo/demo.tape

@@ -0,0 +1,77 @@
+# VHS documentation
+#
+# Output:
+#   Output <path>.gif               Create a GIF output at the given <path>
+#   Output <path>.mp4               Create an MP4 output at the given <path>
+#   Output <path>.webm              Create a WebM output at the given <path>
+#
+# Require:
+#   Require <string>                Ensure a program is on the $PATH to proceed
+#
+# Settings:
+#   Set FontSize <number>           Set the font size of the terminal
+#   Set FontFamily <string>         Set the font family of the terminal
+#   Set Height <number>             Set the height of the terminal
+#   Set Width <number>              Set the width of the terminal
+#   Set LetterSpacing <float>       Set the font letter spacing (tracking)
+#   Set LineHeight <float>          Set the font line height
+#   Set LoopOffset <float>%         Set the starting frame offset for the GIF loop
+#   Set Theme <json|string>         Set the theme of the terminal
+#   Set Padding <number>            Set the padding of the terminal
+#   Set Framerate <number>          Set the framerate of the recording
+#   Set PlaybackSpeed <float>       Set the playback speed of the recording
+#   Set MarginFill <file|#000000>   Set the file or color the margin will be filled with.
+#   Set Margin <number>             Set the size of the margin. Has no effect if MarginFill isn't set.
+#   Set BorderRadius <number>       Set terminal border radius, in pixels.
+#   Set WindowBar <string>          Set window bar type. (one of: Rings, RingsRight, Colorful, ColorfulRight)
+#   Set WindowBarSize <number>      Set window bar size, in pixels. Default is 40.
+#   Set TypingSpeed <time>          Set the typing speed of the terminal. Default is 50ms.
+#
+# Sleep:
+#   Sleep <time>                    Sleep for a set amount of <time> in seconds
+#
+# Type:
+#   Type[@<time>] "<characters>"    Type <characters> into the terminal with a
+#                                   <time> delay between each character
+#
+# Keys:
+#   Escape[@<time>] [number]        Press the Escape key
+#   Backspace[@<time>] [number]     Press the Backspace key
+#   Delete[@<time>] [number]        Press the Delete key
+#   Insert[@<time>] [number]        Press the Insert key
+#   Down[@<time>] [number]          Press the Down key
+#   Enter[@<time>] [number]         Press the Enter key
+#   Space[@<time>] [number]         Press the Space key
+#   Tab[@<time>] [number]           Press the Tab key
+#   Left[@<time>] [number]          Press the Left Arrow key
+#   Right[@<time>] [number]         Press the Right Arrow key
+#   Up[@<time>] [number]            Press the Up Arrow key
+#   Down[@<time>] [number]          Press the Down Arrow key
+#   PageUp[@<time>] [number]        Press the Page Up key
+#   PageDown[@<time>] [number]      Press the Page Down key
+#   Ctrl+<key>                      Press the Control key + <key> (e.g. Ctrl+C)
+#
+# Display:
+#   Hide                            Hide the subsequent commands from the output
+#   Show                            Show the subsequent commands in the output
+
+Output demo.gif
+
+Set FontSize 16
+Set Width 1200
+Set Height 600
+
+Type "git clone https://github.com/dbuenzli/down"
+Sleep 500ms
+Enter
+Sleep 5s
+
+Type "cd down"
+Sleep 500ms
+Enter
+Sleep 500ms
+
+Type "opam build --local"
+Sleep 500ms
+Enter
+Sleep 45s

demo/tape.sh

@@ -0,0 +1,6 @@
+#!/bin/sh
+
+set -e
+
+rm -rf down
+vhs demo.tape