on a real DEC VT320: no digit visible, cursor still visible, little glitch on "box"

[sblendorio]

I'm running ttyclock on a real DEC VT320 terminal, the following issues happen:

• The numbers are not visible (since there are no colors, there are only one-color "white spaces")
• The blinking cursor is not hidden
• Small glitch in borders of the date
  

[anarcat]

epic.