amplified upon receiving more Mold, such as losing the ability to post another letter for each Mold received. On April Fools' Day 2013, Reddit claimed that it had acquired the video game Team Fortress 2, and initiated a site-wide event where users were randomly assigned into two teams, Orangered and Periwinkle, based on both the colors of the Team Fortress 2 teams as well as the colors of the upvote and downvote buttons. As in Team Fortress 2, users were randomly given items and cosmetics to use, most importantly weapons to use against users on the opposing team. Valve also participated in the event, updating Team Fortress 2 with Reddit related cosmetics. When the event ended, team Orangered was declared the victor. For April Fools' Day 2014, Reddit did "headdit", a joke way to navigate and use the website using the webcam. For April Fools' Day 2015, a social experiment subreddit called r/thebutton appeared. It displayed a button and a 60-second countdown timer. User accounts created before that day were eligible to participate. A user could only click the button once, or opt not to click it. If a user clicked the button the timer was globally reset to 60 seconds, and the user's "flair" (an icon next to the user's name) changed color. Colors were assigned based on a gradient from purple to red with purple signifying up to 60 seconds and red as low as 0 seconds. The countdown reached zero several times due to technical problems but eventually expired without further problems on June 5, 2015, after which the subreddit was archived. For April Fools' Day 2016, another experiment was launched involving the "Robin" chat widget. After clicking a titular button, an IRC-like chat window was opened with one other user, and allowed a certain time to pick among three options: "Grow", "Stay" and "Leave". "Grow" would join the chat with another group, "Stay" would close the group chat and create a subreddit with that group as moderators and "Leave" would close the group chat. For April Fools' Day 2017, featured a social experiment based on r/place. The subreddit contained a collaborative pixel art canvas, where a user could place a pixel every five minutes (the timer was temporarily ten and twenty minutes for a few hours on April 1). Many people worked together to create large graphics, such as flags or symbols. Often subreddits would come