local mods = {}

function mods.modifycatfish(pat)
  local function set_block(frame)
    unset_aflag(frame, AF_LOWBLOCK_OK)
  end
  pat:update_frame(1020, 7, 0, function(frame)
    set_aflag(frame, AF_GROUND_UNBLOCKABLE)
  end)
  pat:update_frame(1020, 7, 0, function(frame)
    set_aflag(frame, AF_GROUND_UNBLOCKABLE)
  end)
  pat:update_frame(1020, 7, 0, set_block)
end

return function(pat)
   mods.modifycatfish(pat)
 end