STEP 1 - CREATE TIME-LAPSE TASK

• Create a new Task and name it "Time-Lapse"

STEP 2 - LAUNCH CAMERA

• Add an "App" action
  
• Select your favorite camera app

In this example I'm using the default Android camera.

STEP 3 - INITIALIZE COUNT

• Set a new variable named %count to 0

This variable will be used to count how many photos we took in this time-lapse so we know when to end it.

STEP 4 - WAIT

• Add a 3 second "Wait" action
  
• Label that action "Start"

By labeling this action, we are creating a handy reference point that we want to come back to. This will create a loop that takes multiple photos in a row.​

• Accept to go back to Tasker

This wait serves 2 purposes: it waits for 3 seconds before taking the first photo and also waits for 3 seconds between taking each photo. Change this value to the value of your liking to create a shorter or longer time-lapse.

STEP 5 - TAKE PHOTO

• Add an "AutoInput Action" Tasker action
• Select the "Easy Setup" option
• Open the camera app you selected before and pull down on the notification bar or press the volume down key to start capturing the field you want to click
• touch the shutter button in your camera app
• touch the "Accept" button in the AutoInput notification and go back to Tasker.
• Select the field that represents your camera's shutter button
• Select the "click" action, accept these settings and go back to the task

STEP 6 - INCREMENT COUNT

• Add a "Variable Add" Tasker action
• In the name field write %count

This action will increment the %count variable by 1. Since we initialized it with 0, it will now have the value 1

STEP 7 - REPORT PROGRESS

• Add a "Flash" action
• In the Text field write "Took photo nr %count"

This will make a small flash appear on the screen after taking a photo, reporting how many photos were taken

STEP 8 - GO BACK TO THE START IF NEEDED

• Add a "Goto" Tasker action
• In the Type field, select "Label"
• in the Label field, select the "Start" label
• Add an "If" condition to this action and set it to %count less than 3

This will make the task go back to the action labeled "Start" as long as the %count variable is less than 3. In practice, this means that after 3 photos are be taken, the Goto action will not run anymore. In a timelaps you probably want to take hundreds of photos, so set this value to something like 100 in a real situation​

STEP 9 - POPUP DONE

• Add a Tasker 3 second wait action (not shown in the video)

If you don't add this wait action the popup will probably show up before the last photo is actually taken.​

• Add a "Popup" action with the text "Done"

STEP 10 - TEST

• Press the "Play" button

You should see your device open the camera app, take 3 photos, each 3 seconds apart, and then show a popup with the word "Done"