#Ruby, (削除) 98 (削除ここまで)(削除) 95 (削除ここまで) 91 bytes

Updates every 5 seconds. Only works in Unix-style terminals.

loop{t=Time.now;puts`clear`+"%02d %s
%02d "%[h=t.hour,?-*m=t.min,-~h%24]+?-*(60-m);sleep 5}

Windows command prompt version, (削除) 95 (削除ここまで) 92 bytes:

loop{t=Time.now;puts"\e[H\e[2J%02d %s
%02d "%[h=t.hour,?-*m=t.min,-~h%24]+?-*(60-m);sleep 5}

Ruby, (削除) 98 (削除ここまで)(削除) 95 (削除ここまで) 91 bytes

Updates every 5 seconds. Only works in Unix-style terminals.

loop{t=Time.now;puts`clear`+"%02d %s
%02d "%[h=t.hour,?-*m=t.min,-~h%24]+?-*(60-m);sleep 5}

Windows command prompt version, (削除) 95 (削除ここまで) 92 bytes:

loop{t=Time.now;puts"\e[H\e[2J%02d %s
%02d "%[h=t.hour,?-*m=t.min,-~h%24]+?-*(60-m);sleep 5}

#Ruby, (削除) 98 (削除ここまで) (削除) 95 (削除ここまで) 91 bytes

Updates every 5 seconds. Only works in Unix-style shells.

loop{t=Time.now;puts`clear`+"%02d %s
%02d "%[h=t.hour,?-*m=t.min,-~h%24]+?-*(60-m);sleep 5}

Windows command prompt version, 95 bytes:

loop{system'cls';t=Time.now;puts"%02d %s
%02d "%[h=t.hour,?-*m=t.min,-~h%24]+?-*(60-m);sleep 5}

#Ruby, (削除) 98 (削除ここまで) (削除) 95 (削除ここまで) 91 bytes

Updates every 5 seconds. Only works in Unix-style terminals.

loop{t=Time.now;puts`clear`+"%02d %s
%02d "%[h=t.hour,?-*m=t.min,-~h%24]+?-*(60-m);sleep 5}

Windows command prompt version, (削除) 95 (削除ここまで) 92 bytes:

loop{t=Time.now;puts"\e[H\e[2J%02d %s
%02d "%[h=t.hour,?-*m=t.min,-~h%24]+?-*(60-m);sleep 5}

#Ruby, (削除) 98 (削除ここまで) 95 bytes

Updates every 5 seconds.

loop{system'cls';t=Time.now;puts"%02d %s
%02d "%[h=t.hour,?-*m=t.min,-~h%24]+?-*(60-m);sleep 5}

#Ruby, (削除) 98 (削除ここまで) (削除) 95 (削除ここまで) 91 bytes

Updates every 5 seconds. Only works in Unix-style shells.

loop{t=Time.now;puts`clear`+"%02d %s
%02d "%[h=t.hour,?-*m=t.min,-~h%24]+?-*(60-m);sleep 5}

Windows command prompt version, 95 bytes:

loop{system'cls';t=Time.now;puts"%02d %s
%02d "%[h=t.hour,?-*m=t.min,-~h%24]+?-*(60-m);sleep 5}