diff --git a/mdbook/src/14-interrupts/examples/timer.rs b/mdbook/src/14-interrupts/examples/timer.rs
deleted file mode 100644
index ed5b1dc..0000000
--- a/mdbook/src/14-interrupts/examples/timer.rs
+++ /dev/null
@@ -1,30 +0,0 @@
-#![no_main]
-#![no_std]
-
-use cortex_m::asm;
-use cortex_m_rt::entry;
-use panic_rtt_target as _;
-use rtt_target::{rprintln, rtt_init_print};
-
-use microbit::hal::{
-    gpio,
-    gpiote,
-    pac::{self, interrupt},
-    timer,
-};
-
-struct Blinker {
-    period: u32,
-    timer: timer::Timer<>
-
-static BLINKER: Option<Mutex<RefCell
-
-#[interrupt]
-fn TIMER0() {
-    rprintln!("tick");
-}
-
-#[entry]
-fn main() -> ! {
-    
-}