How to make grep to blink the matched pattern?

GREP_COLORS='mt=X;Y;Z' grep --color 'pattern' infile

• X can set to one of these (represent the Display Attributes):
  0 Reset all attributes
  1 Bright
  2 Dim
  4 Underscore
  5 Blink
  7 Reverse
  8 Hidden
  

• Y can set to one of these (represent the Foreground Colors):
  30 Black
  31 Red
  32 Green
  33 Yellow
  34 Blue
  35 Magenta
  36 Cyan
  37 White
  

• Z can set to one of these (represent the Background Colors):
  40 Black
  41 Red
  42 Green
  43 Yellow
  44 Blue
  45 Magenta
  46 Cyan
  47 White
  

So to blinking the pattern set mt (Matched-Text) to: mt=5;Y;Z (Choose Y &Z colors one from the above list); "note that your Terminal should support the ANSI Colors":

GREP_COLORS='mt=5;30;43' grep --color 'pattern' infile

see GREP_COLORS options for more.