12       0
3        1
 4        1.5
 56       2
 78       3
 9        3.5
 10       4
 1112     5
1.5     4.5        7.5   10.5
10,11 near 12 clock ( 0.5)
12 near 12 clock ( 0)
8 near 12 clock ( 0 )
8, 9 ( near 12) 2               ->
8, 9 ( near 12) 2               ->
8,9 near ( 12) 0                 <-
5, 6 ( near 12 ) 0
8x 0.8
10x 1
12 ( at 5 o’clock ) 0
10 ( at 7,5 o’clock ) 3.5
10 ( near 9 ) 3.5
10 ( near 1.5) 4
8,9 ( near 6) 0.5
10 ( near 6) 2 <-
4,5 ( at 10.5) 1
7,8 ( at 10.5) 2