make booklet fitted landscape boxes

fold_back.tex

@@ -3,8 +3,8 @@
       spread,
   },
   poster   = {showframe=true,
-    columns=2,
-    rows=4,
+    columns=4,
+    rows=2,
   },
   boxes    = {
     left=2pt,
@@ -12,7 +12,7 @@
    },
 ]
 
-\posterbox[blankest]{name=first,column=1,row=1,span=1,rowspan=1}{
+\posterbox[blankest,rotate=180, fit, fit basedim=10pt]{name=first,column=1,row=1,span=1,rowspan=1}{
   {
     \rotatebox{90}{
       Back

fold_front.tex

@@ -3,8 +3,8 @@
       spread,
   },
   poster   = {showframe=true,
-    columns=2,
-    rows=4,
+    columns=4,
+    rows=2,
   },
   boxes    = {
     left=2pt,
@@ -12,11 +12,12 @@
    },
 ]
 
-\posterbox[blankest]{name=first,column=1,row=1,span=1,rowspan=1}{
+\posterbox[blankest, fit, fit basedim=10pt]{name=first,column=1,row=1,span=1,rowspan=1}{
   {
-    \rotatebox{90}{
-      Front
-    }
+    One fine day, in the middle of the night.
+
+    Two dead men got up to fight.
+
   }
 }