CreateFollowupTask.trigger

trigger CreateFollowupTask on Lead (after insert, after update) {

    List <Task> followupTasks = new List <Task> ();
    
    for (Lead newLead : trigger.new)
    {
        if (newLead.isConverted) continue;
    
        if (newLead.Status == 'Open - Not Contacted') {
            Task newTask = new Task ( Subject = 'Intial call', Type = 'Call', ActivityDate = Date.Today().AddDays(2),
                Status = 'Not Started', whoId = newLead.Id);
            followupTasks.Add (newTask);
        }
        else if (newLead.Status == 'Working - Contacted') {
            Task newTask = new Task ( Subject = 'Send email', Type = 'Email', ActivityDate = Date.Today().AddDays(7),
                Status = 'Not Started', whoId = newLead.Id);
            followupTasks.Add (newTask);
        }
    }
    insert followupTasks;
}