Bash Script to append 2 lines after certain text

Question

Please help me with bash script to append following lines to a file (logs.conf) after the line contains "interval 1. logs.conf is located at /etc/logs.conf

$SystemLogRateLimitInterval 2

$SystemLogRateLimitBurst 50

Expected outcome in logs.conf

this is logs.conf file

setting the loginterval 1

$SystemLogRateLimitInterval 2

$SystemLogRateLimitBurst 50

end of file