Timer in D.API?

[Sam Hu]

Thank you both so much.
In DFL there is a Timer class but I can not get it work:
module dflTimer; 

import dfl.all; 

import tango.io.Stdout; 

class LetterPerSecond 
{ 
private: 
Timer timer; 
static int counter; 
static char[] displayString; 
     
void writeChar(Timer sender,EventArgs ea) 
{ 
Stdout.format("{}",displayString[counter++%displayString.length]); 
} 

void startTimer() 
{ 
timer=new Timer; 
timer.interval=300; 
timer.tick~=&this.writeChar; 
timer.start; 
} 
public: 

static this() 
{ 
counter=0; 
displayString=r"This string will appear one letter at a time."; 
} 
this() 
{ 
Stdout.formatln("Before timer is starting..."); 
startTimer; 
Stdout.formatln("After timer is ended..."); 
} 
} 
int main(char[][] args) 
{ 
auto prog=new LetterPerSecond; 
return 0; 
} 

It compiled but just print 2 lines of message:
Before timer ...
After timer...
I am asking Chris Miller on DFL forum regarding this issue.

In DWT,there is a Runnable class I think it can gain the same result ,but not test yet.

Regards,
Sam