[oden][game] Multiple screens, logging, pre/post, bluescreen

Better blue screens and also logging and whatnot

game/log.ts

@@ -1,17 +1,35 @@
 import { color, print } from "./graphics";
 
-const lines: string[] = [];
+interface LogEntry {
+  frame_age: number;
+  line: string;
+}
 
-export function log(...args: unknown[]) {
-  // const line = args.join(" ");
-  lines.push(args.join(" "));
+const lines: Map<string, LogEntry> = new Map();
+
+export function log(key: string, ...args: unknown[]) {
+  const entry = {
+    frame_age: 60,
+    line: key + " " + args.join(" "),
+  };
+  lines.set(key, entry);
 }
 
 export function draw_log() {
   color(1, 1, 1, 1);
   let line_y = 3;
-  for (const line of lines) {
-    print(3, line_y, line);
-    line_y += 8;
+
+  const keys = [...lines.keys()].sort();
+  for (const key of keys) {
+    const entry = lines.get(key);
+    if (entry) {
+      // Life is too short for me to convince typescript.
+      print(3, line_y, entry.line);
+      line_y += 8;
+      entry.frame_age -= 1;
+      if (entry.frame_age <= 0) {
+        lines.delete(key);
+      }
+    }
   }
 }