should work :)

fb/main.go

@@ -1,6 +1,10 @@
 package fb
 
 import (
+	"bufio"
+	"fmt"
+	"image"
+	"image/color"
 	"os"
 )
 
@@ -10,7 +14,7 @@ var (
 )
 
 func resolution() (w int, h int) {
-	resFile, err := os.File("/sys/class/graphics/fb0/virtual_size")
+	resFile, err := os.Open("/sys/class/graphics/fb0/virtual_size")
 	if err != nil {
 		panic(err)
 	}