A survivor of last month’s mass shooting at a Parkland, Fla., high school on Tuesday shared a video and tweet imitating a National Rifle Association (NRA) ad and warning politicians that their “time is running out” to enact gun law reforms.

“We are done with your agenda to undermine the safety of our nation’s youth, and the individual voices of the American people,” Marjory Stoneman Douglas High School student Sarah Chadwick said in a video posted to social media.

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She directed her message to “every government official unwilling to take action and make change,” and “those who refuse to accept commonsense gun safety as a bipartisan issue."

She also mentioned “every spokeswoman with an hourglass who uses free speech to alter and undermine what our flag represents,” a reference to NRA spokeswoman Dana Loesch.

"To every spokeswoman with an hourglass who uses free speech to alter and undermine what our flag represents...Your Time is running out. The clock starts now."

-@sarahchad_ #MarchForOurLives pic.twitter.com/k29FB2vHPI — Sarah Chadwick// #NEVERAGAIN (@sarahchad_) March 6, 2018

Chadwick then flipped over an hourglass, mocking Loesch’s ad for her new NRA TV show.

In a separate tweet, Chadwick warned Loesch: "I told you we have our own hourglass too."

The ad, released Monday, features Loesch standing next to a large hourglass and warning “every lying member of the media,” “every Hollywood phony” and “late-night hosts” that their “time is running out.”

“To every lying member of the media, to every Hollywood phony, to the role model athletes who use their free speech to alter and undermine what our flag represents…Your Time is running out. The clock starts now."

–@DLoesch #Oscars90 pic.twitter.com/SDVjeTxyfB — NRATV (@NRATV) March 4, 2018

Parkland students have spoken out in recent weeks in support of gun control after 17 people were killed at Marjory Stoneman Douglas High School.

Students at the high school have organized the "March For Our Lives" event to protest school shootings and gun violence. It is scheduled for March 24.

Lawmakers have discussed a number of potential reforms in response to the shooting, including banning bump stocks, strengthening background checks and raising the age requirement to purchase a rifle. Thus far, none have come up for a vote.