Fix flashing

src/pattern/flashing.rs

@@ -2,7 +2,6 @@ use super::Pattern;
 use crate::color::{self, Rgb};
 use std::{
     collections::{vec_deque, VecDeque},
-    convert::TryFrom,
     iter,
 };
 
@@ -29,12 +28,10 @@ impl Pattern for Flashing {
         Ok(true)
     }
     fn init(&mut self, num_lights: u16) -> Result<(), ()> {
-        if self.lights_buf.len() == 0 {
+        if num_lights == 0 {
             return Err(());
         }
-        let length_factor = u16::try_from(self.lights_buf.len())
+        let length_factor = num_lights.saturating_mul(u16::from(self.width));
-            .or(Err(()))?
-            .saturating_mul(u16::from(self.width));
 
         let buf_length = color::min_with_factor(num_lights, length_factor)?;
 

src/strip.rs

@@ -128,7 +128,7 @@ impl LedStrip {
                             self.pattern = pat;
                         } else {
                             let _ = message_tx.send(errors::Message::String(format!(
-                                "Error with pattern: {:?}",
+                                "Error initializing pattern: {:?}",
                                 pat
                             )));
                         }