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    <p>How about this?</p> <pre><code># The characters you want to use chars=( $'\xe2\x95\xb1' $'\xe2\x95\xb2' ) # Precompute the size of the array chars nchars=${#chars[@]} # clear screen clear # The loop that prints it: while :; do printf -- "${chars[RANDOM%nchars]}" done </code></pre> <p>As a one-liner with shorter variable names to make it more concise:</p> <pre><code>c=($'\xe2\x95\xb1' $'\xe2\x95\xb2'); n=${#c[@]}; clear; while :; do printf -- "${c[RANDOM%n]}"; done </code></pre> <p>You can get rid of the loop if you know in advance how many characters to print (here 80*24=1920)</p> <pre><code>c=($'\xe2\x95\xb1' $'\xe2\x95\xb2'); n=${#c[@]}; clear; printf "%s" "${c[RANDOM%n]"{1..1920}"}" </code></pre> <p>Or, if you want to include the characters directly instead of their code:</p> <pre><code>c=(╱‬ ╲); n=${#c[@]}; clear; while :; do printf "${c[RANDOM%n]}"; done </code></pre> <p>Finally, with the size of the array <code>c</code> precomputed and removing unnecessary spaces and quotes (and I can't get shorter than this):</p> <pre><code>c=(╱‬ ╲);clear;while :;do printf ${c[RANDOM%2]};done </code></pre> <p>Number of bytes used for this line:</p> <pre><code>$ wc -c &lt;&lt;&lt; 'c=(╱‬ ╲);clear;while :;do printf ${c[RANDOM%2]};done' 59 </code></pre> <p><strong>Edit.</strong> A funny way using the command <code>yes</code>:</p> <pre><code>clear;yes 'c=(╱ ╲);printf ${c[RANDOM%2]}'|bash </code></pre> <p>It uses 50 bytes:</p> <pre><code>$ wc -c &lt;&lt;&lt; "clear;yes 'c=(╱ ╲);printf \${c[RANDOM%2]}'|bash" 51 </code></pre> <p>or 46 characters:</p> <pre><code>$ wc -m &lt;&lt;&lt; "clear;yes 'c=(╱ ╲);printf \${c[RANDOM%2]}'|bash" 47 </code></pre>
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    1. POBash Version of C64 Code Art: 10 PRINT CHR$(205.5+RND(1)); : GOTO 10
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    1. POBash Version of C64 Code Art: 10 PRINT CHR$(205.5+RND(1)); : GOTO 10
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    1. COTons of great information, thank you. That said, your final single-line script is not filling the screen. Any thoughts? It seems it might be an issue with directly including the characters. `c=($'\xe2\x95\xb1' $'\xe2\x95\xb2');clear;while :;do printf ${c[RANDOM%2]};done` works fine.
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    2. CO@spex Sorry, I have no idea why it doesn't work when including the characters directly! maybe it has something to do with the input method of your terminal... Try to pass the string through `od`: `od -t x1 <<< 'c=(╱‬ ╲);clear;while :;do printf ${c[RANDOM%2]};done'` to see what your terminal actually sends... the first line of the output should be `63 3d 28 e2 95 b1 e2 80 ac 20 e2 95 b2 29 3b 63`.
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    3. CODid so, got the same od output `63 3d 28 e2 95 b1 e2 80 ac 20 e2 95 b2 29 3b 63`
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