>>543 Ruby
def analogClockStr( h, bg, positions )
(clockStr = bg.dup)[ positions.index( h.to_s(16) ) ] = '*'
clockStr
end

background = '
┏┓┏┓
┃┗┛┃
┗━━┛
'.strip.freeze

positions = '
ab23
9014
8765
'.strip.freeze

puts analogClockStr( 0, background, positions )
puts analogClockStr( 6, background, positions )
puts analogClockStr( 11, background, positions )