element click again when its failed

[royalmax007]

hi
right now i have task .....in this task have some click on ads. sometime its cant find the element for click some time click is failed so in this case i want a condition . like if click is failed then it will try again for click when click not done this task can be repeat several time because click must be done .so how can i do that please help me to make a task for me with this condition......